Sadiq Khan has rejected Government demands that he extend the Congestion Charge zone to the North and South circular roads.
Neale Coleman has been appointed to the body which advises ministers on the UK’s major infrastructure needs.
The new scrappage scheme follows an earlier scheme which saw 5,000 polluting vans taken off the roads.
The scheme will see 460 new 1, 2, and 3 bedroom properties built on land next to Southall station.
City Hall says the viability of the capital’s commercial and cultural centres is under “immediate threat”.