mate carphone warehouse do a decent one...i have it for business trips !
its is there own vodafone dongle !
it was 20 quid , with a month free !!
it is only a tenner per topup , which lasts one month , or 3 gigg whichever comes first !
its great as long as u dont do any downloading on it .
Should last u for your hospital appointment .
It is 3G too , so its really fast !
Vodafone Top Up and Go Mobile broadband - The Carphone Warehouse
thats a long time to be in hossy mate..wot u in for ??
sometimes hospital machinery can mess with signals , this may not work ......