am I being unreasonable

Like keepingquiet I thought being in a support bubble only applied to a single person joining one other household. I also thought support bubbles had to be people living locally to each other. So I agree with you and would also not go but it will be hard if your DH doesn’t support you. We are around the same age as you (77) and although we are in good health, apart from one dog walk each a day, we have chosen to only go out once a week for food shopping. The only contact we have had with family members since Christmas Day has been phone calls, texts and FaceTime. I think it is up to us all to stay within the rules and not have our own interpretation of them.

Whenever I feel fed up about the current situation I keep thinking back to World War Two when my father was in the army for years and my mother had to cope with a small child, being pregnant with me and food rationing. Her own family and my father’s family lived over a hundred miles away so she had to rely on friends and neighbours. Thankfully she lived in a relatively rural area and didn't have the added terror of air raids to live with. This helps me to keep things in perspective.

No, you are not being unreasonable - but your husband is. I'll add to the voices that have already clarified the legalities and guidance.

Stand firm.

How are you in their Bubble - you don't live alone and don't provide their childcare?

You are right, frue. I agree with Keepingquiet, so stand your ground. Does your DH plan to go without you? It sounds quite risky to me, plus he shouldn’t really be going under the present rules.

Bubbles only apply to single people or those needing child care. Neither applies in this case so you are right, you should not go. Your husband is putting himself at risk, even if he has had his first dose. Only several weeks after a second dose will he have good immunity but may also still catch it and become unwell.
You are right. Stand your ground.

If the kids are at school and you say half term so presumably they are then I think you are doing the right thing and your husband is being a bit daft
I m in a bubble with my daughter and two teen grandkids who live nearby, although I feel ok to go (my daughter is NHS so tests twice a week and my grandson is away working at the moment ) but my granddaughter got really upset and asked me not to go to their house as she works weekends and is terrified she might pass something on to me Of course I did exactly what she is comfortable with and haven’t been since Christmas Dinner, it’s unfair to put that guilt on her shoulders if I was to catch anything

I think you are right. It is too far and if you’re not needed for childcare, are you really ‘bubbled’ with them?
What a difficult situation for you.

UANBU,it`s too far and if you are stopped by the police you will be fined.
Which you should explain to your family.