Hugh - Was Invisible wrote, on 12/12/2011 09:17:
[...]
Hospital has reception problems with t-mobile and orange but 02 and
Vodafone based networks are OK

TIA for any replies.

I would recommend a Tesco PAYG mobile SIM card. It is one of the
cheapest services around. It uses the O2 network which, AIUI, is in the
900MHz frequency range and has better availability inside buildings as
distinct from the 1800MHz frequency range. The 'phone credit does not
have an expiry time and can be topped-up either online or via the
helpline, using a credit or debit card. I *think* you can also buy
credit vouchers from Tesco.

--
Dave N