Well I also had an email today inviting me to attend psychometrics in York in April. Trouble is , I've already completed them and I was waiting for them to confirm this. I don't know what to do now. I have emailed but it seems to take ages to get a reply .
I completed mine 3 weeks ago and somebody that had already done them in the past had to do this MMI then went home after that. He didn't have to complete the whole day. Hope this helps.