Update
Van went into Marshall’s VW Bridgwater Somerset today and fair play the service and attention to my problem was very good, it was a split EGR pipe which they had in stock and replaced under warranty.
Obviously there is a big problem with this but my dealer seem to be on top of it.
I'm on my 2nd egr pipe. (revised, new part is actually flexible and thicker)
2nd high pressure fuel pump (revised)
3rd water pump (each one revised again)
I cannot wait to be rid of the t6 in a couple of years, so expensive, thirsty and unreliable. Shame it drives so god dam good and is epically refined.
How many miles on your vehicle out of curiosity ? Got me worried now and are they both 204 DSG models