I see you're having the same problem as me with LASORS cut-and-paste formatting......
As it's a UK-issued JAR/FCL aeroplane licence with a SEP Class Rating and your colleague has been flying microlight aeroplanes within the privileges, there is no need for him to have any additional microlight rating/licence of any shape or form.
Both the BMAA Chief Executive and the CAA's Head of Licensing were present at the 11th April 2007 NPPL P&SC meeting at which the CAA confirmed this information. Thus neither organisation has any excuse for giving you such incorrect information.
With the NPPL Policy and Steering Committee Chairman's compliments, please refer your CAA contact to Item 15 of the Meeting Notes of the 27th NPPL Policy and Steering Committee meeting and ask him/her to rebrief his/her staff appropriately.