The O2 SIM eventuallu installed with help from Peplink Support, however the connection/bandwith with O2 was poor, and unusable.
EE works fine with my phone, so I bought a 2 year eSIM from EE, but again it wouldn’t install.
Peplink Support are unable to help this time.
And, EE do not support eSIM’s in routers, only phones and tablets .
I have no choice but to return the eSIM.
Unfortunately, it looks as though installing the MAX BR1 Pro 5G up a mast with an Antenna Max, is not a viable option - Shame as this would have been a great solution for me.