I took the pump off the car and took it to eurocarparts for them to see if it was a match to the one they had in stock. It wasn't, the offset was different. So had to put the old pump back on the car and retension the v-belt.
I had a look at ZF's website and took the educated guess that my pump has a 52mm offset on the drive flange face to pump body and ordered one from GSF.
I got the pump and the belt has started to slip badly on the pulley again,lasted about 400 miles, so managed to get a couple of hours today to get it fitted. Sorry there aren't any detailed pics but I only had a couple of hours to get it in and get ready to go out a message. Mum was up for tea tonight too. Sure you wanted to know that useless piece of information.
On a more technical note. I had to take a file and put a chamfer on the edges and remove some material from the mating faces to get the pump to fit in the pivoting bracket.