I've been watching Scott & Baillie again on ITV3 and noticed S3E7 is missing, it goes from 6 to 8. Found it on Britbox and it's not there either. So it's now annoying me and a quick Google says this has been the case for years.
I eventually found it on some website or other (cos it was really bugging me by this point) and there was nothing that would indicate it was sensitive in any way.
Why would they not show a specific episode ever?