Officials 鈥榙iscuss Judith Armitt鈥檚 next move鈥 after her shock departure on Monday

The chief executive of the government鈥檚 拢9bn flagship regeneration scheme for the Thames Gateway was told to quit after only a year in the job.

The departure of Judith Armitt, who left last week, followed rising concerns about the government鈥檚 control of the redevelopment of the Gateway. These culminated in errors over the preparation of the Thames Gateway Plan, which was launched by Gordon Brown two weeks ago at the Thames Gateway Forum.

It is understood that original copies of the 拢9bn plan had to be pulped days before its launch because its figures didn鈥檛 add up.

Peter Housden, the department鈥檚 permanent secretary, confirmed he was 鈥渄iscussing Judith Armitt鈥檚 next move鈥 on Tuesday, the day after 好色先生TV.co.uk broke the news of her departure. He added that Joe Montgomery, departmental director general, had taken charge of the Thames Gateway Executive.

Three senior Gateway sources said there had been huge problems with the plan. One said: 鈥淎 number of concerns culminated in financial errors in the costed plan. What made it worse was they came to light as the prime minister was due to launch it.鈥

Sources suggest the costed plan was found to have financial commitments totalling only 拢8bn, despite the Treasury having signed off a 拢9bn commitment.

A spokesperson for the communities department refused to comment on the allegations that Armitt had been removed from her post, beyond sending an extract from Housden鈥檚 letter. Armitt did not return calls asking her comment on the allegations.

The Thames Gateway Delivery Unit controlled by Armitt is in charge of plans to create 160,000 homes and 225,000 jobs by 2016 in the region. Last month Edward Leigh MP, chair of the Public Accounts committee, urged the government to act to prevent a 鈥減ublic spending calamity鈥 in the Gateway.