In a report published on Monday, the body's transport committee issued a warning about the dangers of current arrangements.

Last year there were 12,360 crimes reported on London's rail stations outside zone one, a rise of 2,000 incidents since 2002/03.

East Croydon, Clapham Junction and Walthamstow Central taking the top places had the the highest crime levels during 2004/05.

Across the network, there is no single strategy for improving the capital's railway stations. Responsibility for security and maintenance lies in the hands of a number of organisations, said the report.

Incentives for train companies to improve stations are lacking. Too often, they are concerned only with reducing waiting and journey times.

And "patchy and inconsistent" work between train companies and local authorities is hindering the fight against crime.

Committee chairman Roger Evans said: "Recent tragic crimes have highlighted a problem which has prevailed for many years.

"These incidents are a warning that urgent improvements are needed to safeguard passengers.

"It is unacceptable that many of London's train stations are unwelcoming and threatening areas, especially during evenings."

Among the recommendations for "quick wins" that could be introduced are brighter lighting, real time travel information on platforms and at street level, consistent signage, more commercial premises, entrances in visible locations and improvements to basic design standards.

"We are disappointed at the under-investment for stations and what appears to be a lack of concern for safety and security," said Evans.

"London needs a strategic approach to its railways and plans to reduce staff must be ruled out."