Broken-down trains and signalling problems have caused morning rush-hour chaos which also affected those travelling to three busy airports for the Easter holidays.
The first incident was at Balham in south London where a broken-down train led to delays to services run by Gatwick Express and the Southern train company.
All routes through Balham were affected, with a number of services to and from London’s Victoria station held up.
The second breakdown affected a train between Ely and Waterbeach in Cambridgeshire. Among the services that were delayed were those run by the CrossCountry train company between Birmingham New Street station and Stansted Airport in Essex.
In northern England, trains run by First TransPennine Express between Manchester Airport and Leeds were among those delayed by a signalling problem near Manchester.
Northern Rail was also affected, with delays between Manchester Piccadilly station and Leeds.
In another incident, a broken-down train between Aberdeen and Dyce led to morning rush-hour delays to ScotRail services between Aberdeen and Inverness.