So shipping appears to have changed, there has not been a boat leaving recently that's gone straight from Nagoya to either Singapore or Suez, the last that did this being Virgo leader which is about to dock in Livorno.
All boats since seem to be stopping off at other Japanese ports. Some boats have left for Shanghai - they have done this in the past, so presumably, these are not carrying UK bound GRs.
Morning Crown, Capetown Highway and Heroic Leader all have stopped at the right birth but then are going to other Japanese ports first.
The ETA for Heroic Leader @Suez indicates it's off somewhere else first - perhaps the Middle East, so it seems unlikely it's got UK bound GRs onboard - unless, of course, the ETA is wrong.
I had hoped to get to October when the last UK GRY's were originally due to arrive but with the apparent increase in challenges of the tracking ships and current work commitments, I'm not going to be able to dedicate enough time to track the movements going forwards, so after 17months I will take this opportunity to hang up my Fleet Admirals hat.
So there is a complete record of the tracking the image below shows all the boats and timings to-date.
View attachment 5333