Good point, Brown! Hadn't thought of the smoke in relation to the MOT. Had been thinking about it in terms of what was wrong mechanically or otherwise.Sounds like things are bedding in nicely. I wouldn't worry about the smoke. The critical thing is that it passes the MOT smoke test, and it is clear that yours has, with plenty of room to spare. So even if it gets a little smokier over the next few years it will be a long time 'til it fails.
When I changed the turbo/intercooler pipes there was a little oil in the old ones that seemed fresh. Now that it has ran a week with the new pipes on I'll have a look this weekend and see if there is much oil in the new pipes, then I'll know how much is getting through the breather in to the air system and through the turbo.
Cheers.