The grieving children of one of the 31 people killed in the Paddington rail disaster have unveiled a memorial to the victims.

Brighton College pupil Piers Beeton, 12, and his sister Olivia, nine, lost their father Anthony, 47, in the crash in 1999.

The children unveiled the memorial sculpture on the second anniversary of the disaster. Afterwards, their mother, Margaret, said her biggest sadness was that rail safety had not improved quickly enough in the wake of the tragedy.

She said: "They are trying but it's taking far too long.

"Nobody wanted anyone to go through what we went through again but already other people have.

"It is tragic that this had to happen. The unveiling of this memorial is a final goodbye from us to Anthony."

Mr Beeton, from Didcot in Oxfordshire, was a senior civil servant in the Northern Ireland Office.

A total of 31 people died and 414 were injured when a Thames Trains commuter service leaving Paddington was involved in a head-on collision with a Great Western express service from Cheltenham.

The Thames Trains driver had passed through a red signal.

The sculpture, by Richard Healy, stands in a memorial garden which is under construction on a site overlooking the crash scene, near Ladbroke Grove in London.