It's a bit late but CONGRATS Stu on passing stage three, sorry to hear Ian didn't get through, I too got the dreaded best wishes email. As for the feedback I was not offered any but would love to know what went wrong.
Ian would you mind sharing some general feedback if you do decide to make that call.
PS.
I am aware that it will be tailored to you but I think it could help the unfortunate ones (i.e. me) to understand a bit more about the selection process.