I have English axle - mk2 esort - and the prop shaft flange it bolted to the diff flange using 4 bolts - the diff flange is threaded for this.

Is this how it should be?

I was expecting a bolt/nut type arrangement? (Land rover-esque)

Is it possible that the bolts should have been screwed into the diff flange, the prop flange going over the bolts with nuts to hold it all in place?

thats the same as mine, and works Ok for me

It's just 4 bolts into the diff flange - nothing else required.

Loctite or other thread-lock compound is strongly recommended, just in case.

David

Yes on both types of flange - some MK2 used MK1 style small flanges with 5/16" UNF threads.