Adding to my original post - I have split my booking via the following sites.
Interreail
- booked via
https://www.interrail.eu/en........
From past experience I would advise booking Interrail tickets at
https://www.myinterrail.co.uk/assuming that you are booking from with the
UK▸ of course.
The passes on are exactly the same as those offered by the .eu site, including the special offers when available.
The only difference is that the pass numbers have different prefix to denote that they are issued in the UK.
The reason for using the myinterrail site is that they have UK based contact points, including by 'phone, for enquires and most importantly, if you have any difficulties with the pass (e.g. incorrect details shown). See
https://www.myinterrail.co.uk/help/contact-us/The .eu website however does not provide any 'phone contact and relies on a chatbot, a "community forum" or webpage forms. See
https://www.interrail.eu/en/support#contact-usThese can all be excruciatingly slow to respond as I found on one occasion when an error on an issued pass was only corrected on the afternoon before I was due to travel, despite having raised the issue several weeks beforehand!
The UK based "myinterrail" will not deal with enquiries relating to "interrail.eu" issued passes and vice-versa.
Dave