Thanks all for the contributions/advise received on the issue. FYI- The part number for the EHPS is 7625477132 exchange price £176.25. (upgraded version) with lifetime warranty.
Changed the oil (including the oil in steering rack itself).
Took the opportunity to replace the horns whilst wings were off for the twin Fiamm ones (recommended in a separate post). Sounds great and runs even better !.
Glad to be back in the Car - issue from start to completion 1 week but seemed a lot longer
