Dont forget about AIR LINKS who flew charters with ex B.O.A,C Handley Page Hermes and later with DC-4s

And, I think, started off with a DC3, G-APUC.

They were'nt DC4s they were Argonauts. Superficially the same but significantly different.
They only had 1 Hermes

Maybe off-thread, but I remember as a small boy in the early 1960s seeing Avro Yorks at Heathrow, in the glorious days when you could see the aeroplanes parked near the southern side of the airport where the cargo centre is now. I believe these were Skyways airline passenger aircraft, or maybe used for cargo. They were painted in a pale green/grey, maroon and silver scheme as I recall. I also remember the Air Canada DC-8 (or maybe Convair Coronado) which over- or undershot and ended up in a cabbage field south of the airport. There was also a regular flight by a Breguet Deux Ponts out of Heathrow , probably still into the early 1970s - that was a sight to behold; was it passenger or cargo?

Originally used on passenger services, & then , later into the 70s, on cargo flights. I think.

The Skyways Yorks had long been given up for passenger service, but did run on into the early 1960s at Heathrow for cargo. Principal charterer was BOAC, who used them to haul replacement engines to AOG Britannias (in particular), and even early jets, stuck downroute with an engine failure. It was not unusual for more than one such mission to be in progress simultaneously.

The Breguet Deux Ponts (alias the "Duck's Pants" :) ) was used latterly mainly for cargo, but did have some passenger seats left in on the upper deck. It did a nightly freighter run from and to Paris in the small hours, and various daytime runs there as well. In about 1968 it was still running a passenger/cargo service on odd evenings from Bristol Lulsgate to Paris - as you drove out on the A38 road from Bristol it would be prominent on the skyline when on the ramp. It was a big aircraft for 4 x R-2800 engines and the 1 a.m. MTOW departure at full bore and gradual climb was well known for waking up the residents around Heathrow.

Final Deux Ponts service from Heathrow 31st March 1971 - another five years and I would have enjoyed hearing them overflying my school on the way back to Paris - another two years and I'd have heard them inbound assuming they routed via Biggin. Damn!

Used to hear the weekly Northolt Noratlas overfly the school on Tuesday afternoons on its way back to somewhere, Evreux?

Had completely forgotten about the Deux Ponts at Heathrow. Way back in the 1960s used to walk the dog with my uncle between the two rivers on the south side and remember seeing DC3s and C46s. Also remember one day being on the roof of the Queens Building when Lancaster G-ASXX landed and taxied up to a gate just below me.

During the 70s (at least) until they phased them out, the 'regular' French AF Noratlas was on the 'third Tuesday' of every month. It was an embassy supply flight. It was sometimes a day late, probably due to serviceability issues? It was also sometimes a day or two later in July if the 14th was anywhere near the 'third Tuesday'.

The only active Noratlas I recall was at a Coventry airshow around 2000. It had been parked tail-on to the commentators' position. When it fired up for its turn late in the show it blew all the loose items, and some not so loose, right out of the commentary box :)

Blimey, it certainly seemed like every week! Of course, being a boarding school, by July 14th I was back home again and enjoying eight weeks of summer sunshine...

The PDF were usually accompanied by a Noratlas as I rec all.