Thanks for the reply. Yes, the turbo is leaking out of the exhaust side, around the outer edge. There are several bolts holding the rear plate on, and I think there is a bearing seal, as mentioned.
I replaced the wastegate hose thinking this is where the problem was, but there is clear evidence of oil around the above mentioned area.
The turbo is a KKK, separate wastegate with adjusting screw protruding out towards fender. Alan