[Neil Jones]

Didn't they finally make new episodes of the Watch With Mother shows due to the switch to colour? Of course those new versions only lasted a few years before the branding finally bit the dust.

Andy Pandy was remade not long after the switch to colour.
The Flowerpot Men wasn't remade until the turn of the century (and even then it was called Bill and Ben), and the show ultimately ended up on CBeebies, though it was just before the channel launched so it started on the BBC One/Two strands IIRC.