Sounds like there are some etching facilities. Also links to several services to order prototype PCBs: https://wiki.london.hackspace.org.uk/view/Guides/PCB_Fabrication
ahhh good find - I'm not in London anymore but that's a good resource
Might be worth posting in the Raspberry Pi thread too for recommendations.
@ACRe19 started
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Sounds like there are some etching facilities. Also links to several services to order prototype PCBs: https://wiki.london.hackspace.org.uk/view/Guides/PCB_Fabrication