I mentioned in another thread that I got the "Ineligible flight" message too, which I've never got before. It seems to be a strike-related thing and nothing to do with the fact that its a LCY flight. My outbound MFU (from LCY) posted fine, but my inbound to LHR, which was moved due to a strike cancellation, is showing 0 miles and TPs.

I nearly always find that MFUs booked entirely through ba.com and not manually interfered with post the correct TPs and miles, but anything where there has been manual intervention at any stage is very hit and miss - most often (but not always) miss.