The Link has a refurbished Pay As You Go NEC E338 on Hutchinson 3G (the "three" network). You pay £34.99 and you get the phone and £30 airtime which must be used in 60 days. Go through QuidCo.com if you can be bothered for 5% QuidCo cashback (this should include the airtime I think).
Weighing 127g, the NEC E338 is relatively light and compact for a 3G phone. It features a large 176x220 pixel display in 65,000 colours and has a rotating VGA camera that can be used for still photos and video calls. The E338 has a large 19 MB memory for storing photos, video clips, ringtones and games.