The Welsh Government's no-deal bunker has been put into action.
The so-called bunker is in the Welsh Government building in Cathays Park.
In September, we took a look around the space and spoke to those leading the efforts to prepare Wales if there is a no-deal Brexit.
As the Prime Minister's October 31 deadline approached and no deal had - and is yet to be given the required backing by MPs - the bunker has kicked into action.
For the last fortnight it has been in operation five days a week and from Monday will run seven days a week.
It will then go to a 24/7 operations.
On Tuesday, before losing a vote which led to him pausing the progress of Brexit legislation, the Prime Minister said that if MPs didn't back him, it was either no-deal or a General Election.
Michael Gove has said that the UK Government has enacted its Operation Yellowhammer - plans for a no-deal - because the risk of a no-deal has increased.
What is the Welsh Government bunker?
Officially, it's the Emergency Coordination Centre Wales (ECCW).
It's been used before when there have been nation-wide issues that needed various agencies to work together, examples include the foot and mouth crisis and the Beast from the East.
Planning for this bunker began the day after the referendum.
"We very quickly realised this was going to be the most complex thing since World War II," a senior civil servant dealing solely with Brexit said. "Every single piece of Government policy is affected."
Immediately legislation had to be rewritten because many of the laws which had been in operation for 40 years were in danger of being invalid. When the deadline was changed, some had to be rewritten again.
The civil service has been "triple running" since the referendum preparing for all three options – no deal, a deal, or remain
.
A sign on the door reads "situation room" and inside there are computers, phones and whiteboards. All now being staffed by teams who have been trained ready to react.
Under the A4 signs on the walls the relevant teams from the health, fire, military, and police sectors will take their seats.
In total, there are three rooms – the situation room, conference room, and partners room.
In the centre of the situation room is a large table covered in a huge map of Wales under glass. It's not a huge jump to imagine it covered in model trucks or people. A croupier stick laid on top to move them as required.
Around the edge are banks of desks with each grouping known as "cells" – a situation, response, director and logging cell – each with their own specific tasks. All senior civil servants have been put on the rota to work within the bunker.
The neighbouring room will be filled with the civil contingency team – experts from the fields of health, transport, and agriculture as well as communications staff.
Next door is the conference room which is dominated by a huge table. Microphones hang from the ceiling while there are large screens on the wall and keypads.
A red metal dragon on the table is the only hint you're in a Welsh Government building.
There are high-tech communications systems in place, which mean Welsh Government ministers can communicate with Westminster emergency response committee Cobra securely.
If needed there is potential – despite staffing "challenges" – for an equivalent unit to be set up in Merthyr.
Brexit planning began the day after the referendum in 2016 but specific no-deal contingency planning started in July 2018 as the prospect of crashing out of the EU without an agreement in place became a very real prospect.
The rooms were due to become operational 24/7 from mid-March with staff working shifts. But as the leaving date was pushed back to October 31 it was paused.
By the time it's fully operational there will be between 150 and 200 staff working in the bunker.
A flow chart shows just how many people will be working to feed information into these rooms.
In Wales there are four local resilience forums operating in the four police areas. For Brexit each of them has carried out their own (secret) assessments of potential problems in their areas and mitigations.
It will be up to the police to monitor and respond to any demonstrations, riots, or protests and information on those are fed back to the "situation reports" and those will appear on the desks of the most senior staff gathered around the conference table.
And as with last time, if no-deal again disappears off the table, the computers will be turned off, phones disconnected and staff will return to their normal desks and their day jobs - but while it remains a possibility, they will remain on standby once again.
