In a briefing to journalists, Mark Canning condemned the military junta for failing to tackle the underlying political "anger" that led to last autumn's unrest.
The Burmese government says 30 people were killed when troops fired on demonstrators but human rights activists fear that hundreds may have died.
Canning said the mood in Burma was "fearful and angry", and he pointed out that a group of around 40 people protested this week in Rangoon, despite the continued "heavy presence" of the police on the streets.
"Going forward we are going to see more demonstrations. The underlying grievances have not been addressed."
Canning dismissed the concessions granted by the regime since the unrest as "tactical".
They included the release of some of those arrested during the unrest and the appointment of a minister to liaise with opposition leaders such as Aung San Suu Kyi.
But Canning said these moves were "designed to forestall international attention rather than signal some fundamental shift in approach. The name of the game for the Burmese government is keeping themselves off the front pages."
Canning also condemned plans by the junta to increase the license fees for satellite televisions by 160 times, from $5 to $800.
The plan, which also involves charging hotels $1,000 for each television they own, was designed to "shut off the flow of information".
Canning said that if the military government goes ahead with the controversial fees "it would prevent most Burmese, including the middle classes, from accessing anything but terrestrial television".
"It would be a terrible blow to the freedom of information."
Speaking by phone from Rangoon, Canning also pointed out that the generals had suspended publication of the Myanmar Times reporting a story about the planned fees.
Ross Dunkley, editor-in-chief of the part government-owned paper, said today: "We got a red card from the government for one week."
He denied reports the government asked that four editors be sacked, but acknowledged that he was asked to make changes in the newsroom.
Canning revealed that there are now more monks on the streets of both in Rangoon and Mandalay after many mysteriously disappeared following the protests.
"The number we are seeing are still way down on what you would have seen five months ago. A significant number may have been de-robed and sent packing back to rural villages."
Also speaking at the briefing, foreign office minister Meg Munn said the British prime minister, Gordon Brown, would be discussing Burma with Chinese leaders on his visit this week.
"We believe that China has an important role to play," she said.
Asked whether Brown would call for China to stop supplying arms to Burma's regime, she said: "I don't know the exact contents of the discussions."
