Thanks guys
I've actually ordered a Linksys
BEFSX41
It seems all of these have a 10/100 WAN port. I'm not a very lucky guy, there's a very high chance that I'd somehow end up with an old BEFSR41 lol.
From what I can gather, this router is basically the same as the BEFSR41, but it has better firewall features, and VPN support (not that I'll use the VPN stuff), but it should still work with the Blueyonder pretty much out of the box I hope.. lol