Aye WOWZZ, those where the days. If I remember correctly the first of the 5 daily rotations to Heathrow which as you say left around 7.00 was Midland 331 then 333, 335,337 and 339. The return runs where 332,334,336,338 and the 340 was the last one in. I can recall leaving Heathrow one night on the 340 and checking my watch. If I remember correctly we where on the ground (landing 06 at Teesside) 48 minutes later. Aircraft was one of the short body DC9,s known as the Pocket Rocket. The girls hardly had time to clear away the plates etc. Previous to that I used to travel down on the Viscount which was a different but also pleasurable experience.