Three major schemes on London’s South Bank – Doon Street tower, Elizabeth House and the Beetham tower – will not see the light of day if Boris Johnson is voted London mayor on 1 May, he declared this week.

Launching his housing manifesto on Monday, the Conservative party candidate pledged not to obstruct the “viewing corridor” onto London’s historic sites. Johnson added that he would build 50,000 affordable homes by 2011 if elected.