Here is a list of UK suppliers I’ve used in the past – this is just for information purposes, I am not affiliated with any of these and would not recommend one over the other. They are in no particular order and all have slightly different offerings – I often shop around for the best deals, although I might mention that some do nice student discounts, which is always worth looking for! I will be adding to this list as I find more interesting sources.
Electronics and Components Suppliers UK:
Maplin is one of the general electronics suppliers with a high street presence in the UK. While not always the cheapest, it is handy to be able to just pop into a store to stock up on components and equipment, although the quality of the offering in each store differs vastly. Has good online offers occasionally and sells Adafruit components (Pimoroni stock, online only).
Based in Kircaldy, Scotland I use Protopic when I can as they do a great 10% student discount and I like the idea of using local suppliers, although I have yet to go and pick up an order. They stock Adafruit, Sparkfun and also crimps and housings, which I have not been able to find elsewhere. Customer service is great as well and they can order components directly from a supplier if they don’t stock them.
If you’re based in London, these guys are a great resource for you, as they stock all the greats (Adafruit, Sparkfun etc.) and you can pick up your components locally. Prices vary, but sometimes they do components other stores don’t stock.
Another UK based electronics supplier, specialising in Adafruit components and the Raspberry Pi. They have regular clear-out sales with good discounts and the occasional bargain, as well as a handy forum for helping you solve your electronics problems.
A large component supplier with world wide presence. Look no further for that JST terminal you’re missing, although you will have to know exactly what you want as their website is absolutely labyrinthine.
Unusual Materials Suppliers UK
Run in partnership with Middlesex University London, this is the primary source for educating folks about smart materials and microelectronics.
Another educational resource supplier, this time for teaching science to the masses. Stocks a good range of electronic components and unusual materials.
Building your own 3D printer