Mecca have disabled my deposits until they get proof that I can afford them (er just check my profit ,7.5k at Mecca and 6.5k at Grosvenor )
Anyway they have 2 options, download docs or allow them access to my bank account via Experian.
Has anyone else used the Experian option,just want to check it is safe,you have to log into your bank account then give
permission for Mecca to access it.
Not particularly this but assume that similar service if they use it to your affordability check. I would say it's secure, you give them read only copy of your bank statement (that what i assume this do as well if it helps them to check affordability top of ID and Address).
Service i've been playing around is giving casino (in this case but what ever business) copy of your one or two year bank statement with all transactions, data already analyzed to count your disposable income, fixed payments in and out, other transactions categorized like gambling etc... and how much you spent any months and of course average. Possibly risks like short term loans, overdrafts etc...
I think it's really secure but if giving much information like one i've been using, personally wouldn't use it if there is no need for that much. In your case it seems that you are winning so uploading few pictures from requested documents probably would share less information with them. I personally only want to share what is actually needed instead of giving them full review of my bank account with all adul site subscriptions and other stuff which shouldn't be much of their business (they are so cheap and not member of many sites

).
EDIT: With quick stalking, Experian don't provide that detail information about your banking what other service i've been using, looks to be much less detailed and verify more your identity, address etc.... But didn't check that carefully as their site have loads to read, some idea about numbers on your account need to be there as used to check affordability, would just to be curious, ask them what all information they do get through that service. If not much, it's really easy and no hassle to send more and more pictures which are blurry or miss some information.