I have used UK pcb manufacturers in the past but they were very expensive.
I then tried some Chinese ones and they were much cheaper.
The best one I found was www.pcbway.com they do 10 pcbs 10cm by 10cm for $5 + $25 fast shipping.
I haven't had a bad pcb yet from them.
They also do instant online quotes. You can upload your zipped gerber files.