I can't be sure, because even though the PPL rules are governed by JAA and thus more or less the same all over Europe, microlights are under national ruling, much more varied - and I am not in the UK, and have trouble enough keeping up with my own national ruling.
That said I am afraid that yes, you will have to sit the exams again. ISTR JAR wants you to have succesfully passed a theoretical exam less than two years before passing the practical (called "skills test" in the UK).
Last edited by Jan Olieslagers; 2nd January 2012 at 18:35.