Accidentally stumbled across this the other day, well worth a watch if you have Amazon Prime.
https://www.amazon.co.uk/gp/video/detail/B07GC4SF8X
An impressive highlight, despite the main attention of the series being on the bikes and their mishaps, was that they were followed the entire way from London all the way to Beijing by a pretty standard looking Transit acting as a support vehicle.
Could that be the furthest east a UK registered Transit has gone overland?