Hi Guys -
Got up this morning got the Boxster out the garage, checked the suspension and checked the steering gear as best I could - no sound at all - drove 120k to the Porsche Centre and didn't hear a thing?
The manager of the Service department, himself - José Maria - took the car out with me and concluded everything was normal but to be sure they took an hour to check her on the vibration machine thingy and had her up on the elevator - no problems at all. So apologies to all, false alarm - the car is in remarkably good condition, no leaks - new brake discs - so a big thank you to her previous owners and Porsche in Tonbride.
Porshe centre in Castellón Spain can't be recommended enough to any owners driving over here.
I can only conclude it is as some of the guys said - normal noises for this car.
Sorry to everyone and thanks for all your help.
Kindest regards
Miguel