I was trying to remember the name of that bend, Was it not Mansfield at the top, Then the long steep down hill, I had the brakes on at the top !!,Then the sharp bend at the bottom That's why I went for a disc.A great period picture. (Just like a modern Formula1 pit stop. )
I can't see anything like that happening nowadays with Health and Safety ruling the roost.
Cadwell Goose circuit was very challenging for the brakes as you were on full fade downhill into Mansfield and so were lucky to have much brake when you got to the hairpin shortly after.
But I went back to standard brakes when I built the L/ning rep, 1980, I did more racing and rode much better I think, Even though the L/ning was nowhere near as fast as my Special.
If you make the photo bigger, You can see the 4 ? type brake we made.
Lots of Fun, Bill.