I'm able to log in and deposit at 32Red and William Hill now and my gamstop status has changed to 'previously active'.
Here's the strange thing...rather than trying to faff around reopening other accounts manually, I thought I'd give Unibet a whirl (as they have Play n Go) and sign up fresh. Pretty sure they're in same group as 32Red...however as soon as I created the account, I got 'account suspended' email saying they would have to do some checks and couldn't give me a reason as to why at this time.
As I understood it, casinos get a yes or no response from gamstop upon log in so I'm not too sure what Unibet are seeing here, maybe Mark might be able to shed some light?
I've tried logging in to Grosvenor, Betat, Videoslots and had no luck. So yes, coming off a Gamstop exclusion seems a ball ache.
The UKGC call it "not yet fit for purpose", says it all. That's the reason they are not making it mandatory yet.