The Orange shop are selling some of their Android PAYG phones with £100 free credit
Eg Orange Monte Carlo £119 + £10 top up free delivery + £100 credit.

http://shop.orange.co.uk/mobile-phones/orange-monte-carlo


http://shop.orange.co.uk/mobile-phones/htc-wildfire-s-black

When you top up by £10 a month for 10 months, sort of takes the edge off it a bit Still good if you are a regular user though.

Read the terms and conditions carefully. Orange have been pulling some fast ones of late (increasing charges on existing contracts).

I wouldn't use them again even if the initial price does sound reasonable.