Virgin used to do a £10 deal of 300 mins and 300 texts but it seems to have gone now!
Have a look on their site anyway
here
or
here
i was with them on a very similar deal,got an upgrade to a android htc phone,then the missus got a htc from '3' for half the ammount i was paying,so i sent mine back on the last day i was allowed to,that p155ed em off i can tell you.
so i got 1 from 3 something like,
500 mins talk time
3000 texts
iirc 5000 hrs 3 to 3
and 1 qig unlimited internet,yeah i know strange aint it,unlimited then they give you a fair usage policy,
2 years contract for 20 quid p/month.