At least three people were taken ill at London Bridge station this morning, but the Metropolitan Police said there was nothing to link the cases at this stage.
Delays of up to one hour and 30 minutes on First Capital Connect between Bedford and Brighton, and between Luton and Sutton (Greater London) due to broken down train at Blackfriars.
Also affecting Southeastern services, with delays of up to 45 minutes between Kentish Town and Sevenoaks, and between Luton and Orpington.
Police are appealing after a £2,500 violin was stolen from a Jubilee line train.
The violin belonged to a 42 year-old musician from Motspur Park who was returning home after performing at a London theatre and boarded the train at Stratford at around 11.45pm on Friday 20th July.
He had four bags with him, including the violin. When he got off the train at Waterloo, just after midnight, he noticed his violin was missing.
Detective Constable Andy Jordan said: “Not only is the violin of considerable financial value but it was also of great sentimental value.
The victim has had the 1880’s violin for 30 years, since he was just 12 years-old. He had described knowing the violin so well, it had become like a good friend.”
The violin is full-sized from a German school from the late 19th century, with the label 'Percy Lee 1936'. It is golden in colour with a wide-striped two-piece backplane with a rippled dent near to the bottom. The tuning peg for the E-string is different to the other pegs.
There was a bow in the case, an octagonal stick with silver winding and leather at the handle.
Anyone with information should contact British Transport Police on freefone 0800 40 50 40 quoting reference B5/LUA of 13/09/12.
Service suspended on Stansted Express between Liverpool Street and Stansted Airport due to obstruction on the line.
Southeastern trains between Grove Park and Bromley North have been suspended due to a broken down train. Tickets are being accepted on local bus routes.
The British Transport Police are trying to trace a man after a woman was inappropriately touched on a train from Birmingham to Euston. The incident happened on Saturday 30 June.
The police say the 34-year-old woman was left extremely traumatised by the incident.
A runaway commuter train overshot a station by two-and-a-half miles because it did not have any sand on board to help with braking in poor weather conditions.
The 6.45am Southeastern service from Charing Cross to Hastings overran Stonegate station in East Sussex by 2.43 miles (3.91km) on November 8, 2010, just after 8am, despite the driver applying emergency braking, Maidstone Crown Court was told today.
Prosecutor Richard Evans said: "Effectively, the train was out of control for 3.2 miles from when braking started to when the train stopped."