These are £44.99 at Argos, catalogue number 553/1062 and the reviews are good.
The cheapest I can find is £37.99 from some place plus postage.
* Long-Range Two-Way Radios with charger pod
* Extra Long Range up to 6 milesˆˆ (10km)
* Channel scan function
* VOX technology – for hands-free conversations
* Up to 968 channel combinations
* Backlit display
* 15 ringer tones
* Supports headset
* Adjustable volume control
* 38 hours battery life
ˆˆDepending on environment and terrain