Peter Masson wrote
G Harman wrote

I believe it was , cutting up on site was the most practical means of
removing it. I wonder how the crew got on? being trapped in a lift pit
with steam and smoke everywhere doesn't sound a nice place to be.

The driver and fireman managed to jump out before the loco followed the
trucks into the lift shaft - very fortunately, as the loco ended up upside
down on top of the wrecked trucks.

The end of the Star report reads:
Said Engine-driver Wheeler as he went off duty after the crash: "I had just
stopped the engine after backing the trucks on to the lift. It seemed no
time at all before we started to slide back. I gave a yell and jumped for
it."
Fireman Sutton, also going off duty, said: "It was the first time I had done
this particular job. I was on the engine platform when I felt it moving
back. I guessed something was wrong at once and jumped off as the engine
skidded back."

The Evening News has:
The driver and fireman, seeing the trucks start slipping, leapt off the
footplate just before the engine fell.

and the Evening Standard has
Fireman A. W. Sutton and Driver A. Wheeler jumped clear before the engine
followed the trucks.

All three papers have a picture of the engine lying wheels up at the bottom
of the shaft (which doesn't look so deep when it's full of locomotive); the
Evening Standard also got a picture of the top of the shaft. Either the
Evening News got to the scene before the others or someone in their art
department drew in some clouds of steam...

(all courtesy of an envelope of apparently random cuttings left by my
father)