@A69 thanks for posting the AAIB report and charts. Assuming the blue dots on the “Measured Data” chart are actual points of measurement for the burst frequency offset analysis (as implied), the satellite and aircraft would appear to have communicated more often than had previously been thought – i.e. at (roughly) the following times:
0042L
0055L
0107L
0225L
0227L
0228L
0340L
0440L
0540L
0640L
0811L
0819L (partial)
It would be interesting to know what prompted the comms between 0225L and 0230L.