I had this page last night just before it worked and got this again today. I clicked the "not recommened" option and got this
I then logged on using my poker username and password and after a few gos where it was not recognised, I was finally recognised.
I think the problem is that there are different terms and conditions on the sports book compared to the poker site and I had to agree to them before I could place any bets.
[ ] After the "10% a month farce" I read them 4 times and 28 hours later I have committed them to memory
[ x ] just insta clicked OK
It appears I can only use the sports book if I log in via the poker site and ignore all the above warnings.
Still managed to get a few $ on Always Waining in the Topham so it was worth it in the end.