Thought this was a pretty good deal, it's also on the currys website but is out of stock.
Designed with security in mind, the Linksys WRT120N Wireless Router will keep your network and personal data secure with WEP, WPA or WPA2 encryption, built-in firewall and Wi-Fi Protected Setup features. The Linksys WRT120N supports a range of extras which can be set up with ease via the browser-based setup assistant.
The Linksys WRT120N Wireless Router comes equipped with a USB adaptor. Experience the freedom of Wireless G and B compatibility by simply plugging it into your PC or laptop. If your wireless access point supports RangePlus technology then you'll be able to enjoy incredible speeds.
Liberate yourself from ethernet cables with the value for money Linksys WRT120N Wireless Router and WUSB100 USB Adapter!
Linksys WRT120N = ~£30
Linksys WUSB100 = ~£19
Seems to be only available in-store, use the stock lookup beforehand.
This product is a CABLE router (ie. Virgin Media / BT Infinity), though the USB adapter can be used regardless.