Our RWC at Farnborough used to monitor the PAR frequency (243.9) even when PAR was not being used. One day he reported he'd heard Nugget 63 (based Canberra) call Mayday wth a double flameout.
'63 was at that time over the Bay of Biscay (it was an MRF aircraft) and had transmitted on 243.0.
By the way, '63 got one re- lit and landed safely at French AF base.