I got an email from Arriva Trains Wales this morning about their Club 55 offer. It's come back again for January until April 2011.
Only catch is, you can't travel to Cardiff on the 4th Feb or 12th March because of the rugby or to Cheltenham on the 15th - 18th March.
But they have new add on fare - pay £40 for a return ticket to London but only via Shrewsbury. Here's the details: http://www.arrivatrainswales.co.uk/Templates/Content.aspx?pageid=383
Here's the email:
Over 55? Travel anywhere on the Arriva Trains Wales network for only £15 return.