I always had a problem with my Visa Electron, all these greedy rail operators would refuse to accept it- then I'd have to go to my local train station and buy it. Their messing around meant I missed the cheap train tickets for Glastonbury and I paid £40 more.
Well as of 2008 the train stations won't pre-book train tickets unless they are a large station. Not that they take Visa Electron anyway. I wasn't in the mood for paying £10 to my nearest train station so I could buy a ticket so I searched online.
I tried all the online rail operators to find a rail operator that accepted Visa Electron and I found National Express East coast does- just use the Visa form. Nice site, very reliable and fast. Unlike some rail operators online there is no credit card fee or postage fee to the UK, so it's a good deal even if you're not using Electron.