NHS Business Manager interview questions

Formal Interview with a panel of 3 people. Each took turns in answering questions whilst the others took notes. took around 1 hour with a time for questions at the end. I arrived 10 minutes early but was made to wait 35 minutes in reception only for someone to come looking for me and then the interviewers accuse me of being late in my interview feedback! Despite being very personable and the type of person that would succeed in their business, apparently I wasn't offered as I let myself down on 1 question. In my opinion what they wanted from that question was clear from the question they asked, but at least I now know what that term means when the NHS use it. Another piece of feedback was that on my online application an email address for a reference had my own email address in it - this must have been google chrome auto fill being a bit zealous and I hadn't spotted it. Fair enough I should have - but it was treated like I was trying to be deceptive. I think this was petty revenge as in the interview when they asked me if I had a good eye for detail I pointed out that Job Description and Person Specification was littered with spelling and grammatical errors. The lead interviewer didn't like that comment one bit as he may well have wrote it!