UK-available router with decent VPN performance below £50?

there's a ton of suggestions in Tips for getting cheap used x86-based firewall with full Gbit NAT (a PC Engines APU) if you are in the US, start reading the thread from the bottom.

Router, firewall, VPN device ... it's a x86, it could be used in several ways.

Do some research on the Barracuda F18, it's even cheaper than the Cyberoam, and the Atom CPU will probably perform better.
Sold as "For parts or not working", and I can't ready the item description at work, it's blocked by
the corp firewall.