No problem - always good to double check!
Yes, both URLs are the same:
https://emoncms.home.<mydomain>.co.uk
I had changed the apache configuration from the default install of
https://emoncms.home.<mydomain>.co.uk/emoncms/
…but did try changing that back in case anything was expecting the /emoncms suffix somewhere.
So purely because Let’s Encrypt didn’t exist when I originally set up the network and nothing is publicly accessible. I do need to have a dabble with Let’s Encrypt though, so maybe this is a good excuse 
.
Originally I was just going to use HTTP but when when that didn’t work, I saw your post over in the other thread (Error: The connection failed, please try again - #6 by mattjgalloway) about Apple requiring SSL and thought “I’ve already got that all set up!”.
Thanks for your help - it’s very much appreciated.