[W. Knight]

Um, I'm confused.  Why does it say copyright Thames Television PLC 1989 and then paint the impression its an indie production (I'm assuming that's "Creative Action Pure Strength" is, unless its something do with whatever that programme was bout) and then the final endcap suggests its an dual ITV programme?

Well, from what I found, "Pure Strength" is the name of the programme (an annual strongman match) and the foundation who organized it: en.wikipedia.org 

The Third match in 1989 was held in Sitrling, Scotland, so I guess that's where Grampian came in; but the Thames, "Creative Action", and the network symbol? Not sure.