When I bought the car 12 months ago, on the list of things I discovered on inspection, was a fair bit of oil on the intake tract connection at top of turbo, very near the brake fluid reservoir.   This still seems to be an issue - see photo from taken from above.   At the same time, I've been chasing an oil leak underneath that collects on the diverter valve, or the charged air housing bolt of the turbo - see photo - generally it seems to cover the underside of the turbo area,