I've also got a 1966 and 1968 timetable online here:
Routings and Timetables
I don't think I've got that particular publicity image, but it might be in one of the books I have. I'll see if I can find it. You could try getting in touch with the BA Heritage collection at Heathrow (
https://www.britishairways.com/en-gb...age-collection), or alternatively (and a bit of a long shot) trawl through the PDF archives for the old Flight magazines. It might be in one of them of course... (see here:
https://www.flightglobal.com/pdfarchive/)