The information requested falls within the responsibility of the UK Statistics Authority. I have asked the authority to reply.
Letter from Peter Fullerton, dated September 2013
In the absence of the Director General for the Office for National Statistics, I have been asked to reply to your recent Parliamentary Question asking, how many people in (a) Ashfield constituency, (b) Nottinghamshire, (c) the East Midlands and (d) England were paid the minimum wage in each of the last five years. (169002)
The Office for National Statistics does not produce estimates for the number of people paid at the national minimum wage. However, you may be interested in the 2013 Low Pay Commission Report, which includes an estimate for the proportion of UK jobs that may be considered 'national minimum wage jobs', meaning that they are either below, at, or up to 5 pence above the national minimum wage.
(see paragraph 2.5 on page 20)