Well, not really. You simply fly to DXB, DOH, CMB (tricky on BA!) or Bangalore and pay cash for a connection. Or even fly to SIN and connect there.

HOWEVER .... flying oneway FROM MLE to LON is relatively cheap. Go on Expedia and price it up. Qatar and Emirates usually have decent J fares to the UK, one way. Check one day either side of the day you want.

Alternatively, get the BMI credit card and use the free miles from that to book a reward seat MLE-SIN-LON. On hols at present but I think you get enough miles purely from the sign up bonus to book this for one person, then either get a 2nd card for your partner or buy the extra miles you need.