Last year the NAO confirmed it would be conducting an investigation into the rationale for then-Chancellor George Osborne committing £30m of public funding to the Garden Bridge project through the Department of Transport.
It has now said it intends to "carry out a factual investigation looking at the Department for Transport's handling of its £30 million grant to the Thames Garden Bridge project. It will not look to conclude upon the value for money of the project as a whole."
Of the £60m of public funding committed to the project, £30m is to come from the Department of Transport and £30m from Transport for London (TfL). However TfL has decided £20m of that funding will be treated as a loan and must be paid back.
Anyone who wishes to provide evidence for the NAO's investigation should email the study team at email@example.com. The investigation is scheduled for the autumn.