Does anyone have experience using Megatrain (sounds like a movie title)? If I understand their web page it is possible for me to travel by train from London to Portsmouth and back for about 2 GB#s. Is there a catch? Is is like Ryanair where the basic fare is cheap but they charge you for incidentals. Also is it possible to purchase tickets using a USA issue credit card? This seemed to be a problem in the 2000s.
Thanks for your input.
Geor(ge)