Wanted: tubular tyres (and tape)

The damn valve broke after fitting and wasting £7 of tufo tape.

I am in london Saturday and Sunday!

Anyone have tubular tyres and rim tape (not sure I want to cement) going cheap/spare?

Please! Thanks!

EDIT: Sorted in Isambards

Bump just in case anyone is about!

Tape is more needed than tubs (ordered some tubulars in case)

bump!

Is valve not removable type ?

Super old school, unfortunately... but it's where the valve is cemented to the tube that cracked/punctured, so I don't fancy sewing