Mayor Boris Johnson has promised to look again at Crossrail construction safety after a worker was electrocuted.
During the Olympic construction, a collective agreement on health and safety was put in place between the construction firms and the unions. The mayor was asked whether a similar agreement should be introduced for Crossrail.
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"I do not accept the allegation that I have brought the Labour Party into disrepute", said Livingstone.
Family and friends of the victims of Grenfell Tower have been paying tribute to those who perished in the disaster.
The balmy conditions have swept in on a high pressure system, dragging in hot air from the continent, according to the Met Office.