Suppliers for materials
plywood sheet
"Manchester's premier timber merchant and DIY supplier"
https://www.atlantictimber.co.uk/plywood.html
-thats cheaper than wickes by £4 a sheet
-If you look for furniture grade ply or hardwood ply that's nicer stuff
- Reads timber I found were helpful - but timber is expensive.
Getting circuit boards printed: - PCB manafacture
JLCpcb from China are cheap and good quality. Just remember you'll get duty charge as well.
Aisler are based Netherlands and do cheap prices for small orders of 3 or 6 boards. They tend to be slower than jlc though
For small boards OSHPark is a good option, but the free postage option started taking months after the USPS problems, so haven't used them in a while. For larger boards I haven't been able to beat JLCPCB, and so far have managed to avoid any import charges by keeping the cost below £15