External Link/Members OnlyWeird deal they seem to be offering, buy a £5 flex package which gives £5 credit, then get an extra £15 credit and 1Gb web access for free.
If you checkout using code KMFreebies, they'll add on another £10 free credit.
Rates are better than the big boys, except for 3s 3-2-1 deal.
If you go to their FB page and "like" them, they are claiming to give you free calls for a year!
External Link/Members OnlyI haven't used them so cannot comment on how good/bad they are, but thought it was worth posting up. One thing I would say though is just use the number they give you, don't port in an existing mobile number, unless you don't mind losing it should anything go wrong.