In message , at 14:33:20 on Mon, 24 Jun
2019, Graeme Wall remarked:
At High street Ken the position of the steam loco meant it was in
the open
But even the under-the-canopy engine in their shot of Ealing
Broadway is completely devoid of any smoke or steam.

They've found some condensing tanks?

I don't know what remediation they have, but my close-up video of the
loco arriving at Ealing Broadway has absolutely no smoke, and just a
small amount of steam escaping from the safety valves. No steam from the
traction gear.

Examples from this video (not mine, I wish he'd buy some image
stabilising software!) eg at 1:15, 3:20, a little smoke at 5:10, not
much at 11:45, 14:40, 16:30.

https://www.youtube.com/watch?v=YBK9Q9t03d4
--
Roland Perry