Is there any chance of you changing your flights now? Or are you tied to this particular itinerary and looking for hints.

If it's the latter, my advice is to leave it all alone for a couple of weeks. New security rules are expected to come into force within the next 10 days. When they've been announced, you will have a better idea of what you can and can't bring. Your limiting factor on this trip is going to be what is permitted through security at MUC and LHR, which may be running on the same rules by the time you travel.