As an ex-pat, he will be elligible for housing allowance and education allowance for any kids. Salary, hmm hard to say really, what will happen is they will make an offer and it won't be necessarily what was talked about at the interview, as once HR get involved they tend to offer the very minimum they thinkthey can get away with. Also with the HKD to GBP exchange at the moment it may not seem great. I personally wouldn't accept anything below HKD45K.