The only place I know is M&B radio in Leeds - lots of odd electrical parts, scopes and loads of radio ham stuff.
I've had a lot of XLR plugs, polystyrene caps, kettle sockets, mains filters and some toroid cores from there.
The opening times are hit and miss though - you have to take a chance.
Here's a list of component suppliers/electronic surplus companies in the UK. I haven't included the "usual suspects" Farnell, RS, Craplin etc:
Surplus electronics company. They used to be pure surplus, but now do a weird mix of surplus, new components and tools. Here's their site-
...their website isn't that easy to nav, but the best thing to do is get on their mailing list. Nice fat 30+ page free catalogue every coupla months. P+P= £3.75
2. WCN Supplies:
This is a great small surplus company. Used them loads over the years. Some excellent surplus bargains...I picked up a 6U desktop Rack enclosure for £35 a few years ago Here's their site-
Don't be put off by the minimal website. Again, it's best to get their free catalogue every few months. P+P only £2.25!
3. Squires Model and Craft Tools:
Don't be deceived by the name! I sent off for their free catalogue, and received a 620 page A5 size catalogue! Stacks of stuff. Tools, soldering irons and accessories, toroidal transformers, relays, 12-way rotary switches, a great range of ICs including my favourite VB408 VRegs, transistors diodes, bridge rects etc. Orders over £7.50 are FREE!! Here's their site (appears to be down at the 'mo)-
4. ESR Components:
Another great supplier of new components. Great ranges of semis and passives. Very good value. Download their catalogue in PDF, or send off for the paper copy. P+P only £2.50+VAT for small orders. Very fast service too. Website-
5. Bowood Electronics:
More good value new components. Fast turnaround too. Here's their website-
...some good "£1 Bargain Packs" too for all the basics, 1N4148s etc-
I love this place. I always order too much...but never enough, if you know what I mean I know Jonathan H got some good scores here too....
Well I don't think any of these will blow Skycraft out of the water, but between all these places I can usually find what I want. And if you don't know what you want, send some money in an envelope to-
...and they'll send you what they want to send you!
One final tip- I get some of my best "surplus" and junk/treasure finds at Radio Fairs. Check here for the latest "action"-
You'll never fail to find a "bargain" at these places!
(edited and updated version of a post I did at TT!)