I suspect all the photos were from the TriStar's world tour in late 1972.
Lockheed were very slick with the paint and decals during N305EA's stay in the UK. Courtesy of abpic.co.uk, here it is first at MAN:
and, supposedly the same day (though that sounds a bit dubious), landing at LHR for BEA to play with:
Then a few weeks later at the Farnborough show:
Aviation photographs of Registration: N305EA : ABPic