Looking at LHR traffic yesterday and today, I have a question: has the RAF gone into the charter business? Yesterday, an Air Tanker A330 left Brize Norton for Amsterdam and then flew Amsterdam to LHR, using the civil reg G-VYGM, aka ZZ342. It made the trip LHR to AMS today and is due back at LHR at 16:10. What piqued my curiosity was the flight is using a Titan Airways call sign, AWC009. Today, one of Titan's, G-ZAPX flew back from somewhere to LHR, (allegedly from Ascension but I don't believe that, given its previous call was at Accra and those flights usually overnight in the Canary Islands), using AWC809.
The Air Tanker flight from AMS must be carrying fresh air as it is due at LHR at 16:10 and scheduled to depart again at 16:30, so loading and unloading wouldn't figure in that brief turn around time. I wonder if G-VYGM is the aircraft painted in the special Boris's Union Flag camouflage scheme?