A Norfolk MP has vowed to carry on the fight to make sure direct trains from West Norfolk are not scrapped as part of a �6bn project.

Elizabeth Truss, MP for South West Norfolk, joined members of the Fen Line Users Association in raising their concerns to transport minister Theresa Villiers over the Thameslink programme.

The project claims to provide more frequent, longer and new trains on the London line to cut overcrowding.

It could also see new and improved stations, new track and improved signalling and trains travelling from King's Lynn to as far away as Gatwick Airport from 2015.

But the Conservative MP is concerned that the improvement work could stop at Cambridge due to problems with power and platform size – leaving only a shuttle service to Downham Market and King's Lynn.

Following the meeting with the minister, Ms Truss said: 'I am still concerned by the lack of track and power supply upgrade and Thameslink compatibility with the Fen Line. I will keep pushing our case to ensure West Norfolk does not miss out.'

Department of Transport figures obtained by North East Cambridgeshire MP Stephen Barclay, who was also at the meeting, put the cost of extending the service to Kings Lynn at between �60m and �80m.

Ms Truss added: 'Steve Barclay and I will present a case for the next Network Rail spending round due shortly.'