Spotted this in quidcos hot offers.
Buy a ticket online and get £4.50 cashback.
Got to be worth a punt, especially with a big jackpot. If you don't hit the jackpot, at least you are £2.50 to the good.
Go through quidco, not the link @ HUKD
PS Didn't it used to be £1.50 per line? Not played for ageshttp://www.national-lottery.co.uk