Virgin Trains are selling cheap train tickets form London Euston to Manchester with the condition that you print them yourself (which seems like a small price to pay for some great savings!!)
To book simply go to the Virgin Trains website and pick up these tickets for a bargain. Even if you can't find some for a £1 for the date you are looking for you can still pick up a bargain as the site lists tickets for £7 and £9.
Keywords: cheap train tickets, london euston, manchester