I've not used it, but I'm told giffgaff.com is good.
Seb
--
skype: seb.bacon
mobile: 07790 939224
land: 01531 671074
A Three SIM from home will work on 3 UK at no charge whatsoever ('3
like home') - which is what I use travelling in from Ireland.
If that's not true, you can buy a 3 SIM in the UK for £1 - get £15 of
topup vouchers and buy the "All-in-one 15" add-on:
http://www.three.co.uk/Discover/Phones/Get_better_value_with_an_Add_on
There are probably other options on other networks (which are: Orange,
Vodafone, O2) but I know that one's broadly cost-effective, though it
doesn't have a fabulous reputation for signal.
jh
[snip]
This assumes, in case it needs stating for anyone else:
* That your phone/device is not network-locked and
* That it supports UMTS/EDGE/HDSPA and has a SIM card slot. US-like
CDMA phones from North America are useless here
jh