ajd1992 From UK - England, joined Jul 2006, 2645 posts, RR: 6 Reply 2, posted (3 years 1 month 3 weeks 6 days 1 hour ago) and read 3508 times:
You have to file it Manchester-Munich then as you get your first call to descend into Munich, cancel your IFR clearance, refile in flight planner to Singapore then request IFR to Singapore. You can't do A to C via B unfortunately.