On the trains, signal problems at EalingBroadway has resulted in delays of up to 45 minutes on the First Great Western, Heathrow Express and Heathrow Connect.
The study, carried out by property consultancy GVA for Crossrail, found properties in places such as EalingBroadway, Southall, Hayes and Harlington, Farringdon, Whitechapel, Custom House, Woolwich and Abbey Wood could be boosted by up to 25%.