E2save.com has this Sony Ericsson W810i (best selling W800 series) mobile on clearance with 8 months Free rental (12 month contract)

O2 contract with 400 x-net anytime minutes and 100 texts / month.

Quidco gives whopping £36.50 cashback with every contract sale. The terms cost (after Quidco saving more...

The CarPhoneWarehouse have the Sony Ericsson W810i walkman phone, a popular upgrade on the W810i model, at £1.99 per month for 8 months on a 12 month contract. It's on the orange network. For £135.93 (after cashback) you get the W810i, 12 months line rental (after which you can cancel), 200 x-net mi more...