Almost, I think...... So, the pickup is definitely blocking with carbon. It's quite easy to clean in situ with bottle brushes and WD40 or degreaser. Mine lasted 2000 miles between cleans.
The accepted cause of this is exhaust gases getting by the copper injector seals so I took it to a diesel specialist who called me a couple of hours later and said he couldn't find any evidence that exhaust gases were leaking. I drove for around another 1000 miles and then dropped the sump to check - Lots more crud build up....
So I thought I'd tighten the injector camps a bit. Now these are meant to be torqued to 4NM (2NM before recall) and then turned by another amount (around 270 deg) to stretch the bolts and lock the nut. I think this takes the actual torque to around 9NM. When I got the torque wrench on the bolts and set to 6NM, it took many ratchets to get it even to 6NM. This was the case for all 8 bolts. I think all the bolts either hadn't been torqued correctly or came loose after only 30,000 miles which is a bit worrying. My current theory is that they were only leaking when reving the car to high RPM, hence the reason why the specialist couldn't find an issue.
Now, bearing in mind I had already had the engine replaced for exactly this issue only 30,000 miles before, there is either a fault with these bolts that the recall hasn't fixed, or the dealer didn't install the injector clamps properly, which I consider gross incompetence.
So, I've tightened the clamps, I've done about another 1000 miles and everything is good. Once I get to 3000 miles I'll start to believe it's sorted! I'm heading to Slovakia in 2 weeks so fingers crossed.......
BTW - 'Vehicle System Inspection Required' coming on over 2000RPM is the indication that the strainer is becoming blocked. Gives you time to take action. I drove carefully from Newcastle to Inverness with this and don't seem to have done any harm.
Good Luck!