Leather in London?

[plinthstar.livejournal.com]

Hello, there. I need your help lovely ppl.

I want to make a bag out of leather, like a shoulder bag type thing. I have a sewing machine that can sew leather, but I have no idea where to get some good quality cherry red leather in the London area. Also, I want to put some white piping on the edges of the bag...Any ideas on how this is done? Thanks for all you r help, people!