Auto electrical stuff.

[Manky Monkey]

Stafford Vehicle Components.
All manner of useful electrical bits for custom & kitcar builders. Nice lights for trikes etc. Lots of other 'leccy stuff, including some really neat little metal toggle switches with tiny coloured LEDs built into the ends.
www.s-v-c.co.uk
info@s-v-c.co.uk
08456-581251.

[53catalina]

I've been using these guys for a while and they are very good. Fast delivery of items as and when required.

http://www.autosparks.co.uk/

[Manky Monkey]

Can't get a better recommendation than a satisfied customer.
Still waiting for that write-up on your car for the site by the way! 

[Tony oily bike]

I’ve used “Vehicle Wiring Products” a few times. No complaints and a good variety of stock. Have some odds and sods specific to cars, and to bike too.

www.vehicleproducts.co.uk

They’ve a handy little catalogue they'll send through if you bell them  0115 9305454.

Myself and mate Andy use their braided plastic sleeving as a way of making bits of visible wiring loom look rather neat on bikes following a tip from a retired RAE engineer who’s restored countless British vintage bikes.