As above can someone tell me what the bolt size and strength is for connectingthe prop to an English axle?
Thanks

here you go

Atlas/English Axle Prop Shaft Bolt Escort MK1 MK2 Capri | eBay UK

They are also the same as the prop to viscous coupling bolts on freelander 1's, you can buy them your local LR dealer

Two completely different designs of flange were used on english axles with completely different bolts.

Early ones with the smaller flange were plain 5/16" UNF bolts.