The cost of the Olympic aquatics centre has risen by a further £11m because of attempts to speed up construction to make up for earlier delays, and concerns over whether it will be warm enough for competitors

The centre, designed by architect Zaha Hadid and being built by Balfour Beatty, will now cost £268m, £54m more than the £214m originally budgeted.

The new costings were announced by outgoing Olympic Delivery Authority chief executive David Higgins as he unveiled the latest quarterly review of progress on the project.

Higgins also revealed that the decision to remove the planned £7m “digital wrap” around the main stadium, alongside other savings, meant the flagship Sir Robert McAlpine scheme ould
be completed to the original £496m budget.