I would consider two approaches, in tandem if you like, to answering the current salary question (if you feel you have to answer the question, and want to make your current salary appear higher).Firstly, don't worry about just adding 10% on to your basic. Even if they do check your payslips etc., once a job offer has been made nobody is going to quibble over a 10% difference.Secondly, include a fictional bonus in your current salary. Tell the recruiter that your basic is £xx,xxx, but you are also due to receive a bonus of xx% of salary. Tell them that due to your performance / sales etc. this bonus is always paid in the range of, say, 30% to 50%, and that you would only consider a role with similar total compensation, even if that were in the form of basic salary.This means that it won't show up on your past few payslips, and that you can claim to be earning more than you actually are. Of course, it won't work in certain companies (Accenture, Deloitte etc.) below a certain seniority, but consulting is a big world and there is a lot of variation in people's pay packets. For people coming from industry, this is even easier.The bonus also serves to show how important you are to your current firm and that you have been performing well etc. etc.