Hello and welcome to a special minute-by-minute blog covering a minor first in British politics - a sneak preview of the Queen's speech, which itself will not take place until November.
Click here for full coverage of today's PMQs
Mr Brown has already indicated this morning that his three priorities for his first full parliamentary session as prime minister after 10 years on the sidelines will be housing, the NHS and education. In fact, the eagle-eyed among readers may remember he also said that on arriving at No 10 at the end of June. And at his Manchester acceptance speech as Labour leader. And on the Labour campaign hustings.
So it's fair to assume housing, education and health will be the centrepiece of today's mini announcement (the government is also publishing a 50-page document setting out more detail), plus the already announced constitutional reform bill.
Mr Brown has previously indicated that he would like to revisit the fraught issue of extending the time limit on holding terror suspects without charge to 90 days. This was one of the big defeats of Mr Blair's administration (although, of course, it's often overlooked that the period was in fact doubled, from 14 days to 28 days), and so could provide a flashpoint for a future Commons vote.
Although the Tories and Lib Dems oppose such a move, the recent attempted attacks in London and Glasgow may persuade a few Labour backbenchers to swallow their doubts.
The actual statement follows straight on from PMQs, at 12.30pm, so log back on here to follow it as it happens.
12.30pm
The Speaker tells MPs to shut up. Mr Brown says that for decades the gracious address has been drawn up in private, but now and in future it will be announced in advance in the name of transparency, to invite debate on them both in the Commons, Lords and region by region.
Employment, healthcare, education and housing are the future focus, the PM goes on. All pupils will stay in education or training until 18, all employees will have the right to a company pension, and there will be three measures on housing and planning.
On home buying, which will be a priority like it was after the second world war, there will be 240,000 new homes a year from 2016, mostly on brownfield land and environmentally friendly. There will also be a new housing agency, and the Barker report will be fully implemented in the planning bill.
The planning gain bill is provisional, however, reveals Mr Brown, because if before the autumn it is demonstrated that other infrastructure developments will benefit communities he will defer it. So something of a U-turn alert there.
Mr Brown says there will be announcement on "covered bonds", or 20-25 year fixed rate mortgages, from the chancellor, Alistair Darling, later today.
Eco-towns, with zero- or low-carbon housing, will be built more quickly, but "we will continue to protect robustly the land designated as green belt". Is that cast-iron enough for the Tories?
12.40pm
Other bills: a new transport bill, a children in care bill, an unclaimed assets bill, the human tissues and embryos bill (already published in draft)... Mr Brown is rattling them off at his familiar budget speech speed, ie breakneck.
Turning to security, Mr Brown says they "stand ready" to introduce new criminal justice measures, from the Sir Ronald Flanagan policy review among other sources, but the Home Office plans to consult with all parties on increasing the conviction of terrorists, and in particular to increase the period of detention without charge for terrorists suspects.
Mr Brown's reaching a peroration: he commends this statement to the House. Although MPs will want to read the 50-page background briefing to see the detail.
Mr Cameron complains that it sounds like an innovation to preannounce everything, but "we've heard it all before".
The Tory leader complains that Mr Brown has been promising to build more houses since 1994, and first brought in the idea of 25-year mortgages four years ago.
"He's plotted and schemed for 10 years but all we've got is a rehash of the 1997 manifesto," says Mr Cameron.
He points to "86%" in opinion polls who want a referendum on the EU treaty as an example of Mr Brown not listening to the public.
The Speaker butts in to calm MPs down.
Mr Cameron welcomes the idea, a Tory one originally, that Mr Brown will look at the idea of questioning terror suspects more after they have already been charged.
He's back-pedalling on the planning gain supplement, adds Mr Cameron.
And who has been running the NHS for the past 10 years, he goes on.
Either the review is bogus or the legislation hasn't been thought through - or, knowing this government, probably both, jokes Mr Cameron.
The Tories go on to complain that the city academies plan has been watered down.
He also wants a proper bill of rights to replace the Human Rights Act, and a proper answer to the "West Lothian question".
There was nothing to address the "broken society", Mr Cameron goes on, citing his party's own report on the issue this week.
Answer questions and "ditch the pre-prepared rant", orders the Tory leader.
He wants answers on pensions, maternity wards and a referendum on the EU constitution.
"All this prime minister has to offer is more of the same," he concludes.
12.50pm
All reconfigurations will be on medical grounds, replies Mr Brown - and as for the referendum, "he should listen to the voices in his own party, where the debate is raging" he goads, quoting Lord Heseltine as saying there is no need for a plebiscite.
On housing, 400 more sites are being examined for new building, while the new home building agency will help those seeking to buy.
The PM scores a very good hit on Mr Cameron - quoting back at him his own words, firstly to the youth wing of his own party about the need for more flats for young people, than at a later address to Age Concern, saying there should be no more housing for young people. If those quotes are accurate, it's quite a damning contradiction.
Mr Brown is in full-flow, citing U-turns on grammar schools and taxes on flights.
And he misquotes Margaret Thatcher: "You [Mr Cameron] turn if you want to, but it's clear that the Conservative party is not for turning."
12.55pm
Sir Menzies Campbell's turn. He welcomes the commitment to prelegislative scrutiny.
But he goes on to ponder where the required funding for keeping 16-18-year-olds in training and education will come from. And the Lib Dems want local authorities to reap the benefits of local development.
And we need three million new environmentally friendly homes by 2020, he says.
Meanwhile, doctors and nurses are demoralised by the constant reorganisation, he claims.
He welcomes intercept evidence being used in trials, and the questioning of suspects after charge.
But Sir Menzies wants annual carbon targets in the climate change bill.
And there should be no "hidden subsidy" to the nuclear industry, which is already getting £70bn from the taxpayer, Sir Ming says.
Finally, the Lib Dem leader wants the repeal of "inept" and out-of-date legislation. We should strike from the statute book provisions which have long since lost their use, he concludes.
1pm
Mr Brown makes some warmish noises about that last point, but says that according to the Commons library fewer bills are passed under Labour than under the Tories.
He only promises that the nuclear industry will have to pay "their share" of storage costs - but the consultation will take account of Lib Dem views.
The PM promotes apprenticeship-style 16-18 training and education.
Roberta Blackman-Woods (Lab, City of Durham) worries about developments simply being luxury flats.
But Kenneth Clarke, the former Tory chancellor, welcomes the prime minister's commitment to pre-legislative scrutiny.
So does Labour MP Graham Allen (Nottingham North), after calling Mr Cameron's response "churlish and childish".
Mr Allen is a long-term advocate of transparent and open legislative scrutiny, and more draft bills. Mr Brown acknowledges Mr Allen's interest in the area.
Kali Mountford (Lab, Colne Valley) sings the praises of micro-generation of energy, that is combined heat and power systems, something the London mayor, Ken Livingstone, has been pushing for.
Mr Brown tells a Tory MP he will build more prison places as well as looking at alternatives to prison. Chris Bryant (Rhondda), a Labour backbencher, wants to help more people get off incapacity benefit and into work.
PLaid Cymru's Elfyn Llwyd (Meirionydd Nant Conwy) welcomes the statement but adds that "there's a whiff of deja vu about it".
He welcomes the rethink on planning gains tax. And he insists his party be part of any cross-party talks on terrorism.
1.10pm
Labour's Jeremy Corbyn (Islington North) says that three quarters of the people in his inner London constituency have no hope of ever buying a house and the only solution is to build more social housing.
Edward Leigh (Con, Gainsborough) asks how many of the 240,000 new houses a year will be for young single people, and how many for will help house the net influx of people into the UK.
There's an attempt to release more land to build more houses. Michael Meacher (Lab, Oldham West and Royton) criticises the "Babylonian excesses" of private equity and the affect it has on inequality in British society.
There's lots of praise from all sides for having a pre-Queen's speech announcement to allow more consultation and transparency. Labour's George Howarth (Knowsley North and Sefton East) is the latest to compliment the PM on it.
Bill Cash (Con, Stone), perhaps unsurprisingly, asks exactly why Mr Brown is ruling out a referendum on the new EU treaty (the EU is something of a pet issue for Mr Cash).
Because attempts to create an EU constitution "have been abandoned", replies Mr Brown curtly.
1.25pm
David Clelland (Lab, Tyne Bridge) raises the plight of carers, who didn't get much of a mention in the statement.
Diane Abbott (Lab, Hackney North and Stoke Newington) wants reassurance that the extension of detention without charge will only apply to terrorism charges.
Emily Thornberry (Islington South and Finsbury) echoes Mr Corbyn's point. A flat in her constituency starts at £300,000, so what hope is there for any young house buyers... but the Speaker cuts her off mid-flow before she gets the chance to slag off local Lib Dem policies on the issue. There's other occasions for the honourable lady to attack other parties, or even her own, says Michael Martin.
"We ready to release a lot of public sector land to make it happen," Mr Brown says of the need for more house building, in reply to a Tory MP.
Labour's Nick Raynsford (Greenwich and Woolwich) welcomes the dropping of the planning gains supplement bill.
Mr Brown says that the government is willing to make a deal on postponing it if other ways of getting infrastructure gains can be found.
1.30pm
Lib Dem Bob Russell (Colchester) compares Labour's record with Margaret Thatcher's, who built 400,000 council homes a year when she was first PM, he says.
Our priority was first of all to renovate existing stock, replies Mr Brown. Having renovated, we have now to build.
Labour's Tom Clarke (Coatbridge, Chryston and Bellshill) welcomes the help promised for disabled children and their carers. Mr Brown repays the compliment, saying Mr Clarke was a "pioneer" on work in this area.
That's the last question, and the Speaker apologies to those who've not had a chance to ask a question.
Your thoughts, please?
