Looks like I have a few options.
1. A reconditioned alternator from England at 175 pounds sterling + 70 pounds surcharge which you get back if you send to old alternator back to them.
2. A salvaged alternator from England at 150 pounds sterling with a 30 day warranty.
3. A new regulator ( I farely sure the regulator is faulty because everything else has been changed in the alternator already !! ). I got a quote of 325 euro for a new regulator from a main dealer in Ireland.
All these options will end up costing about the same, so I not sure which is the best one. A reconditioned alternator means it was nackered at one stage and repaired, a new regulator may not solve the problem and the salvaged on may be just about to go !!.