Colin, the camouflage schemes of the GR variants have changed, sometimes depending on role, over the years. They have been green/grey, light grey, mid grey, dark grey and desert pink. The Tornado F3's are normally 'Air Defence Grey', a two tone overall grey scheme, not unlike the earlier Phantoms. The ADV (F3 etc) versions have a longer fuselage, with the nose radome longer and thinner, and the re-fuelling probe is fully retractable into the fuselage. If you have a look in the modelling section, under 'What's on the workbench', you should find a shot of my somewhat dusty and worn model of the F3 version.
Hope this helps.
BTW, nice shot of the GR, Blaydon. Any connection with the town of the same name, on the Tyne?
Terry.