You are definitely not being unreasonable To want him there. Of course you do, it’s awful having to go through this alone.
However, I work in this part of the NHS and I’ve sat in on a lot of meetings about the restrictions. The units are desperate to relax them, they hate this too, but where they are still in place it’s because it’s really not safe. Each unit has different issues and with scans it’s usually small rooms with no ventilation etc. There have been regular in depth risk assessments at trust level, and restrictions have been reduced where they can be.
You can’t liken it to going to the pub for several reasons: you can choose whether to go to the pub, and more importantly leave if you’re not comfortable. That’s not possible with medical care, particularly for important testing or in maternity wards. If all the staff in a pub come down with COVID, they can close the pub for a few weeks - if the staff in a maternity unit catch it, they can’t provide maternity care. They are already understaffed due to staff having symptoms, testing positive, self isolating, too vulnerable to work etc. Some services are on a knife edge already.
They have to keep the risk down as much as they can, and it absolutely sucks and I wish it weren’t the case. But there have been cases in maternity units, even with the restrictions as tough as they are.
Each LMS have different guidelines at the moment mainly due to the set up of their facilities. Some are allowing partners to the 12 week scan but no others, some to 20 week scan, some to both and some to none at all.
All I can say is that there are lot of people working really hard to try to resolve this safely. I fear though that with things going as they are, any relaxation of restrictions will stop soon in many trusts. It’s awful.