I have been reading about the start of 45s, and one site, I forget which, suggested the last UK pressing of a 78 by the UK major labels was in 1962. If I find the source again I will confirm the disc tracks and artists.

If Johnny Preston - Running Bear was on 78 it would be AMT 1079 which was on discogs but as a mis-numbered 45 without image.I am working on last Mercury 78s so we will overlap probably if we find it !

Is this it (popsike) ( https://www.popsike.com/thu/phpThumb.php?src=%2Fpix%2F20160516%2F401121816839.jpg&w=133&h=100&zc=1&hash=9b420da113dbc8cb0f50ec67d77abd9c But they could both be indian presses - there is a third result on popsike that is is indian . I note the prices of the Indian and South African Ones are quite high , worth a weeks pay or more in some places