Climber ID

Hello all,

Hope everybody is enjoying the sunny start to the bank holiday weekend!

Today I've removed an old shed to make way for a seating area and wondered if anyone could help ID this plant. It's huge, rambling over the garage and I'm not even sure where the roots are. I do know that late last summer it had lovely white flowers though. 

is it a keeper or should I get the secateurs?

thanks in advance 

Tom