Instructions:NEW CUSTOMERS ONLY!!!
If you have already registered then why not get someone else in the house over 18 to do it too?
This should give you a nice tidy profit whatever the outcome of your bet, at the moment Betfair have doubled their affiliate commission so Quidco are offering £50 cashback, on top of that you get a free matched bet so if you deposit £10 and bet £10 you get another £10 bet free, you can do this up to a maximum of £25 (where you get £25 free also) - Please note you only need to risk £10 to qualify for the £50 Quidco payment.
You can fund your account in several ways but please note that using the Paypal option will incur fees so if doing it that way make sure it's over £10 after fees rather than before fees so that you will get your quidco.
The £50 Quidco element of this deal will expire at the end of March when I believe it will drop down to £25.