Rail lines reopen between Paddington and Reading
Rail lines between London Paddington, Heathrow Airport and Reading have reopened following earlier disruption.
Network Rail confirmed engineers have fixed the damaged overhead electric cables on the route.
The company apologised for the problems caused to journeys this morning, including Bristol City fans trying to get to their FA Cup match at West Ham.
A spokesperson said: "We'd advise passengers to check before they travel via National Rail Enquiries or their local train operator."
National Rail said trains could still be cancelled, revised or delayed by up to 60 minutes.
It comes as Transport for London said that Tube strikes will affect its services between Sunday and Friday, adding that “there is expected to be severe disruption across the whole Tube network”.
The strike by London Underground workers started on Friday after last-ditch talks failed to resolve a pay dispute.
The walkout by members of the Rail, Maritime and Transport union (RMT) comes during a dispute over a 5% pay offer and other issues including travel facilities.
Control staff are being 24 hours of action on Sunday, while from Monday to Wednesday nearly 10,000 RMT members will strike across the Tube.