The Boy Who Turned Yellow, 1972

No need for yellow warning panels with that livery .

Yellow chalk?

Carol Royle would've been just 18 when that was released & it's not on her profiles anywhere.

All the cast lists I turned up are as so:

Cast (in credits order) verified as complete

Mark Dightam Mark Dightam ...
John

Robert Eddison Robert Eddison ...
Nick

Helen Weir Helen Weir ...
Mrs.Saunders

Brian Worth Brian Worth ...
Mr.Saunders

Esmond Knight Esmond Knight ...
Doctor

Laurence Carter Laurence Carter ...
Schoolteacher

Patrick McAlinney Patrick McAlinney ...
Supreme Beefeater

Lem Dobbs Lem Dobbs ...
Munro (as Lem Kitaj)

Rest of cast listed alphabetically:
Nigel Rathbone Nigel Rathbone ...
Schoolboy (uncredited)

Peter Schofield Peter Schofield ...
Beefeater (uncredited)

Does also say part filmed at Holborn, presumably Aldywch Branch platform.

Yes, I know what you mean!

Short of getting hold of a copy of it (and it's on Amazon as a DVD standalone of part of a CFF triple pack, btw), we are unlikely to find out much more.

The TV Cream site has this useful guide:


TEN ICONS OF THE CHILDREN’S FILM FOUNDATION

1) A RED-FACED, BOWLER HATTED AUTHORITY FIGURE GETTING HIS COMEUPPANCE
As far as the Foundation was concerned, those in power are seldom up to any good (exceptions are the police, who are always helpful but tend to turn up too late). Ronnie Barker in A Ghost of a Chance (1978), David Lodge’s corrupt councillor in Cup Fever (1965) and countless others had their pomposity pricked by spirited youths. Comeuppances generally represented by said authority figure slipping in a puddle and falling on his rear.

2) A STIFF, STARCHY SCHOOLTEACHER WHO JUST DOESN’T GET IT
As perennial as those dastardly councillors, anyone in gown and elbow patches is grist to the Foundation’s revolutionary manifesto. Many an adventure was held up by pesky demands for homework and detention, but the most impressive of all was Jeff Rawle’s apoplectic history master ‘Sniffy’ Kemp, forever putting the kybosh on the time-travelling fun of A Hitch in Time (1978).

3) A BUNGLING HENCHMAN
Every criminal mastermind in CFF films somehow felt obliged to employ a clueless sidekick whose stupidity allows the kids to foil his dastardly schemes and make good by teatime. Roy Kinnear in High Rise Donkey (1980), Bernard Cribbins in Night Ferry (1977) and Bill Maynard in Sky Pirates (1977) are archetypal criminal dunderheads.

4) A HEALTHY OUTDOOR ACTIVITY
Anti-authority they may have been, but it was still an odd boy who didn’t like sport in the world of CFF. Football aside, there was cricket in Egghead’s Robot (1970), cart racing in Go, Kart, Go! (1964) with Dennis Waterman, skiing in Avalanche (1969), scrambling in, er, Scramble (1969), and athletics in Sammy’s Super T-Shirt (1978), albeit illegally helped by the titular tiger print garment. By 1984, the kids were allowed to participate in such rebellious activities as forming a ska band (Pop Pirates), as long as they foiled some record-copying villains along the way.

5) A KINDLY RAG AND BONE MAN
The middle-aged may be untrustworthy councillors to a man, and young men are inevitably hoodlums and petty crooks, but old people are, of course, always on the side of the kids – rag-and-bone men more so than anyone else, for some reason. Wilfrid Brambell, funnily enough, majored in these roles in The Salvage Gang (1958) and High Rise Donkey. Sadly he wasn’t on hand for A Horse Called Jester (1979), in which a knee-high Sadie Frost saved a tinker’s flea-bitten nag from the knacker’s yard.

6) A KINDLY BUT INEVITABLY RATHER TATTY FANTASTICAL FRIEND
Wonders were performed on microbudgets to bring to life such magical creations as Electro-Nic, the ski-wearing electrical educator in Michael Powell’s The Boy Who Turned Yellow (1972); a Battersea-bound Yeti saved by William Hartnell in Zoo Robbery (1973); the titular giant rabbit in Mr Horatio Knibbles (1971); Glitterball (1977), a ball-bearing from space, no less; and Kadoyng (1972), the environmentally-sound alien who saves a small village from motorway obliteration. Speaking of which…

7) THE ENVIRONMENT, BEING SAVED
Your bog-standard CFF kids have little time for those who would defile our endangered wildlife, as The Peregrine Hunters (1977), The Last Rhino (1961) and, er, Calamity the Cow (1967) make plain. Elsewhere pollution was the enemy, in whimsical man-seal fantasy Mr Selkie (1979) and The Battle of Billy’s Pond (1976), and even nuclear meltdown in quarrybound Welsh nailbiter One Hour to Zero (1976). Failing that, a bit of National Trust conservation is always good for a laugh: the kids saved John Pertwee’s branch line in Runaway Railway (1965), and of course the crumbling dwelling place of loveable old ghosts Jimmy Edwards, Patricia Hayes and Graham Stark was rescued from bowler-hatted demolition in A Ghost of a Chance.

8) SUPER POWERS CONFERRED BY MUNDANE OBJECT OR OCCURRENCE
Providing wish-fulfilment for many a child, and an easy way of getting out of ‘scrapes’ to boot: super strength conferred by t-shirt (Sammy’s Super T-Shirt), invisibility conferred by a pair of plimsolls in Paganini Strikes Again (1973), invisibility conferred by ingestion of ‘chemical chunks’ in Where’s Johnny? (1974) and, perhaps most desperate of all, clairvoyance conferred by a bump on the head in What’s Next? (1974).

9) A DAFFY BUT LOVEABLE PROFESSOR WITH AN UNRELIABLE INVENTION
The kind which, naturally, adventures could start from, such as a time machine, invented by Patrick Troughton in A Hitch in Time and John Bluthal in The Flying Sorcerer (1973), a robot in Egghead’s Robot, a teleporter in Junket 89 (1970), a sky bike in, er, The Sky Bike (1967), and superglue in Hoverbug (1969). They don’t have to be old: David Spooner invented a ‘goal repeller’ in Blinker’s Spy Spotter (1972) and, improbably, Keith Chegwin cloned his sister in The Troublesome Double (1967).

10) A BOY WITH HALF A PLASTIC FOOTBALL ON HIS HEAD
As modelled by Plastic Head in gang war drama Terry on the Fence (1985). Never quite took off the way it might have.




which is very helpful, but doesn't mention loveable micro-skirted young ladies as a iconic CFF staple, so maybe she was a one-off.

Will try & investigate further.

You can glimpse another platform through a cross passage on the driver's side. This is only possible if the station is set up for right-hand running or there is a cross platform interchange with another line - of the lines that used 1938 stock I think that would mean Bank, London Bridge, Kennington (Northern), Oxford Circus (Bakerloo) or Finsbury Park (Piccadilly)
Or the filming was done out of hours with the train running wrong-line.

The filming was must have been done out of hours with the train running wrong line. The wine red Leslie Green tiles (many covered by adverts) can just be made out, which rules out Bank, London Bridge, Kennington (Northern), Oxford Circus (Bakerloo) or Finsbury Park (Piccadilly.

That is correct, but some sequences were filmed elsewhere (Charing Cross/Embankment and Chalk Farm) as I said in my post about an hour or so ago.

Anyone know why the woman on the platform recoils in horror because the train is yellow, instead of the usual red?

She must have has a very sheltered childhood!

I'll go with that. All done at Holborn.

There was a song about this boy, was there not? Ol' Yeller? Or was that a dog? I grow confused.

Did Fess Parker also play Davy Crockett in another film? Imitation coon-skin caps were all the rage when the film came out: cats went around with a hunted look in their eyes.

....A different Hawkeye from the one with Trapper John and Hotlips! Heavens - we have strayed considerably off topic!!!!

That's what I thought as well, but apparently she's not