He chaired several of the council's major committees: Policy and Resources from 1991 to 1993; Planning and Development, 1987 to 1991; Finance and Personnel, 1983 to 1987; and Housing, 1979 to 1983.
He was Leader of the Council at the time it agreed to buy back the Westminster Cemeteries after they were sold without proper provision for maintenance - a decision made by Shirley Porter to which David was not a party.
Weeks was deputy leader to Shirley Porter at the time of the "Homes for votes scandal" and was found jointly liable along with Porter and others to the tune of £36 million by the District Auditor, but this was reduced on appeal by the High Court.
[5] In a 2001 judgement, Lord Bingham of Cornhill, described Dame Shirley and David Weeks, as guilty of a "...deliberate, blatant and dishonest misuse of public power.
[8]David died on 2 November 2021, after fifty years of marriage leaving his widow Heather.