Edward Fox bit role?

I watched 'This Sporting Life' just yesterday and much to my surprise I also saw Edward Fox! I suppose he had to start somewhere. It's one of those unheralded English films that deserve to be more widely seen I think...

I've got to go to the zoo Mac, there's a tiger having a birthday party....

Not the only interesting actor in a bit part in this film.

Glenda Jackson also appears in it. She went on to become an important actor, and notable politician. She's uncredited.

The likes of Leonard Rossiter and Frank Windsor also appear in smaller parts (though not as small)

Edward Fox and Glenda Jackson became international stars in the '70s.

In the late '60's, this film would appear on the late show. I guess, as years go by, additional movies ate ade and crowd out the old ones.