Assuming you're on VM cable (if you are on ADSL these won't work):
http://www.ebuyer.com/product/54774 (wired)
and
http://www.ebuyer.com/product/63763 (wireless)
are popular choices. Note that at £35 the wireless router is only £10 more expensive than the wired one. Personally, I think the wireless router is the better buy as it gives you the choice between wired and wireless.