A full timetable is expected to return at the end of April

Rush-hour commuters have used the completely reopened Central Line for the first time despite warnings of over-crowding.

The last of 49 stations on the line came back into operation on Saturday on the extreme western stretch of the line.

But not all its fleet of 85 trains have completed the modifications needed after January's derailment and services are not as frequent as usual.

London Underground (LU) expects to restore a full working timetable of Central Line services around the end of April.

An LU spokesman said on Monday: "The Central Line is running. Due to the slow frequency, there is some congestion."

The line was suspended when a train derailed at Chancery Lane station in central London on 25 January, injuring 32 people.

The incident was caused by a traction motor attached to the underside of the train coming loose and falling on to the track, derailing carriages.

LU was forced to close the line while it modified its trains, causing widespread disruption to Tube users.

The disruption has cost London Underground �40m, while the cost to the London economy is thought to be about �275m.