MY obvious fallback option is Starlink, which would be OK but for the premium subscription and set up cost.
This leaves me with a 4/5G mobile signal. I would, therefore, need to buy a suitable router to provide wi-fi and at least one ethernet port.
Any suggestions would be welcome?
AFAICR from looking it up at the time it was rated for 150Mbps and was under €150 in price - and it was globally available.
For 5G Mi-Fi, I have only tried Netgear Nighthawk M5 which using Qualcomm chip. Speed is okay but it generates a lot of heat which is a big problem for this portable device and its battery.