Bit late to this, but I am sure an AN124 passed over northern UK last Sunday pm around 14.30 bound for Europe, there was a Cargo Lux 747 some 20 miles in front I think. I did not have phones or binoculars, and quite forgot about it until looked in on this thread. Very odd sounding engines which initially caused me to look up, though the fact that there were some Contrails was unusual enough these days.
Cheers
Mr Mac