[James2001]

There's two other episodes that were done entirely on location and film, I wonder if they'd ever be remastered in HD (though of course it needs the original film to still exist)- or even inserting the film inserts back into the regular episodes, as has been done for some other shows.

I know they released a Blu-Ray of the 1985-89 OFAH Christmas episodes a few years back where the most of the filmed inserts were rescanned in HD (apart from the 87 special, which was all upscaled, presumably the original film's gone walkies).