I use this , for emergencies, and for consumer rights if buying something.
The one i could get, to rebuild credit ratings was Visa , Vanquis Bank
You can manage account by SMS too, or online/paper.
Currently you can apply and could get £25 credited to account if you visit www.vanquisoffer.co.uk
and please enter code CR06E in promotional field.
Be responsible with it, do remember its not wise to use credit card for bills unless you can pay it back. its more of a cashflow, especially if you are repairing your credit score. They arent Long term borrowing tools, or intentedfor financing exosting debt, thats the responsibility bit.