Do it on a trip to the oxo tower.

A bit far and short notice, i want to do it on or before valentines day

Boro match, or send her a text
Take her somewhere nice for a meal. Like The County at Aycliffe Village.
Slip it on her while shes sleeping.. When she awakes just say well will you... short simple.. not heard it done before![]()
Pay £50 to some smack head old whore to get 'Will you marry me?' tattooed on her arse, go home, position yourself in such a way that the old smack head's arse will be facing the doorway your girlfriend will enter and get the old whore to give you oral sex, when your girlfriend enters the room she will see the very romantic 'Will you marry me?' and be completely overcome. She'll be the envy of all her friends when she tells them how thoughtful you were!
In a used condom.