Is that slew rings they are making there
@V8Druid ?
Possibly, some of them Mike .... place locally here, who I've done quite a bit for/at/in makes titanium jet engine nozzles (amongst other things) ... IIRC up circa 11 ft in dia.
used to love time in IEP Doncasters site .... got in there a lot with the cranes and did smallish fab work for them.
Knew many of the guys there well and the maintenance foreman/manager was an ex-pupil, who was a good friend ...
went to his funeral sadly a few years back - went to bed and never woke up

....
seeing all that sort of stuff close up and sweating is amazing ....
their press hammer is about 60ft high ...
used to need the manual extension out on the 18 tonner (80ft of stick) to reach the top and be able to work ....
in there every 4 months tightening the frame draw bolts with a hydraulic tensioning system.... IIRC the bolts were 10" diameter - 8 of 'em, top to bottom of the press frame .....
the scale is mind blowing
and the ring rollers are just something else to watch
got some pix somewhere putting the new rolling shed up (read - Hangar)

...... many years ago