Negotiating your salary can seem daunting but it needn’t be if you’ve done your research. The interviewer will expect that you know your own ‘worth’ and will look for a confident and assertive response. You should really know what salary range under offer before you get to interview stage (and where you fit on the scale). Let the interviewer know that you’ve done your homework by saying something along the lines of “I have researched what a current reasonable rate for this job would be and I know I’m well qualified and enthusiastic so would expect at least…….”