The trouble is with this virus is that it puts a huge dividing line between those who prefer to be cautious and those who want to get back out there/some who think the virus is a bit of a hoax, and both sides end up getting nasty. Some of the posts on here are unnecessarily rude to the OP and others who want to be cautious.
It is OK to want to be cautious. And it's OK to not feel comfortable with the amount of socialising that someone is doing. We all have our own comfort level.
The government's own scientific advisors have popped back up again, admitting they are concerned about the level of infection. Some have suggested that the government strategy isn't right. Just because "the government allows it and encourages it" doesn't mean it's a sensible thing to do. Seriously, you have seen the absolute fucking shambles they've made of everything since March and you still think it's OK to follow Boris' advice blindly?! I do not trust that man to act in my best interests so I'll decide what I feel is safe based on actual science, thanks all the same. I'm not going to go swanning all over the place just because the rumple-headed dickhead at No 10 tells me it's OK and that the virus will magically choose not to infect me.
A couple of people on this thread have described what sounds like a really sensible approach - eating out as a family and ensuring the pubs they go to are very quiet and properly distanced. I have friends who have taken full advantage of everything being open and have been constantly out, going quite literally up and down the country in pubs, restaurants and one group have also been overseas. I totally get wanting to go back out but the extent some people have taken it to will be contributing to the virus rising right now. If they've picked it up somewhere, they'll have spread it around the UK.
And tbh, we all know who is socially distancing among our peer group. I have some friends who are out and about, but very diligent, and others who just don't give a shit. It's very easy to tell.
OP, YANBU to be concerned about COVID. Death rates may be low at the moment - and we don't know why that is, possibly because more time spent outside is one of the theories. As winter comes and people are exposed to greater viral load once more, mortality may soar. Also, there are growing concerns about the long-term effects of the virus - it seems to cause long-lasting disability in some folk. Thing is, it's new so we just can't be sure - and for that reason wanting to be cautious is completely understandable.
I agree with PP, I don't think I'd get into too much of a fight just yet - numbers have taken a sharp upswing so maybe hold your horses for a couple of weeks and see what happens. Hopefully it will all calm down again but scientists are predicting the second wave. If that does appear, your DH may be much more open to your point of view without a big row.