I have seen advertised offers for discounted Business Class fares from MUC to LHR.
If you try to book them >30 days in advance there is a low availability. But more than 40/50 days and the minimum stay requirement will do the trick and you will also get morning flights to London and the evening return.
Therefore not only the not so sought after midday flights. ^
So for October bookings (e.g. Oct 25-Oct 28) you will get the Club Europe return flight MUC BA LHR BA MUC in J for the best advertised and in reality offered price of approx. 321,09 Euros.
Which is a fair quote if you think of the blocked middle seat and all the privileges of Club Europe. The next price level of approx. 521,-- Euro r/t is even more widely available.
So be flexible in your schedule and search more than 30 days in advance. @:-)