Aqua
Established in 2002, Aqua credit cards are designed for people with a poor credit record, or no credit record at all.
Aqua cards can be helpful for building a credit history, as you're reasonably likely to have your application accepted, even if you have a less than perfect credit history.
Aqua is owned by NewDay Ltd, which runs a number of credit cards for high street retailers, including Debenhams.