Lots of great advice, thank you for the advice and not for attacking me, I was only asking because I was unsure what's acceptable and what isn't.
As per advice: I won't mention it until 1) if I get offered the job or 2) they mention it...
I did research and for the job role the average salary is about 4/5k higher than what they were expecting.
To those asking, as I previously mentioned, I didn't know the salary offered when I applied... I only emailed them out of the blue and it was only after digging deep that I found they posted the role for advertisement with the salary offered.
When I emailed, they responded straight away and were impressed with my qualifications, and asked for references almost straight away which is why I wondered (if they are keen after the interview) if I could possibly ask as I've never done that before so wasn't sure, I've always accepted salary that has been offered and I am not greedy, but like someone has also stated (I am one of those who will lose due to CV) I am aware many are sadly looking for a new job, but there's no point taking a job that won't see me through. On the other hand, I am keen on the role and am nervous going forth if I reject it, will I get another chance? I do feel I can bring a lot to the company given my experience and qualifications.
Sorry there were too many to tag but I appreciate those that gave me sensible and honest advice without judging. The ones that mentioned the facts about women and less pay, this is very interesting and has given me a boost of my worth. I'm saying this now with confidence but I will probably chicken out when I'm there :'-))