A last word on this from me. Credit Expert referred to a company called 'Highcreditscore.co.uk' in association with Rewards Now. I'd never heard of and hadn't mentioned this group, and initially ignored the reference, thinking that CE might have understandably got cases mixed up. However, upon Googling I found that Highcreditscore share the same PO Box address in Edgware, Mdx and are probably the same company. I'd never seen Highcreditscore's website either, but at least there is a 'cancel membership' option (albeit in classic small print) that one can action in writing and refer to legally later if the need arises. That option btw is hidden behind a very reasonable-sounding & flashy service interface. This whole sorry episode underlines the need for vigilance against being 'sharked' and Jalexa's point about there being no such thing as a free lunch.