Hmm thats strange, when i travel from cornwall to reading a return ticket is about £1 more than a single.squawkBOX said:Don't buy a return ticket, buy singles. Single from Reading to London, then a single from London to Glasgow central. Try it out and you'll find its much cheaper than buying a return.
EDIT:
Cheap day single from Reading to London: £12ish then the singles start around £15ish each way, if you've got a YP card you get 1/3 off some tickets.
Old Wino said:Fly instead, then get a railair coach from Heathrow, wouldn't cost much more