Jeff - dunno about the brake pipe ends - they are NOt the usual 3/8" unf - guessing if I say 3/8" Whitworth ?? You may want to sniff around this car http://forum.scottishmini.co.uk/showthread.php?t=2183 not too far from you.
They are either BSF or UNF, a mixture of both is used on the car. The front wheel cylinders are different to the rest of the car, but cant remember which is which. Try phoning ESM or Charlie Ware's.