The leader of Portsmouth City Council's Labour group has resigned over the controversy surrounding its costly landmark Spinnaker Tower.
The Spinnaker Tower is to cost taxpayers £8.4m
Councillor Leo Madden stepped down on Thursday night ahead of a report into the spiralling costs of the project.
It was under his leadership that the council commissioned the millennium scheme as a top tourist attraction.
Despite promises that the costs would not fall to the taxpayer, the city has been left footing an £8.4m bill.
After nearly a decade of leading the city's Labour group, Mr Madden said in a statement that the decision to go was his and his alone.
A report into the troubled development of the 541ft (165m) tower, which will open later this year, is to be published this month.
Built on Gunwharf Quays, near Portsmouth Harbour Station, the Spinnaker Tower will offer spectacular views across the harbour for an expected 500,000 visitors a year.
Its development was first approved by the Millennium Commission back in 1995.