The good news is that the vaccine programme is going really well and something else, that doesn't seem to get mentioned much, is rapid, cheap, easy testing. This would, and is starting to, make a big difference and would mean some restrictions will definitely be eased or lifted completely in the near future.
I think the difficulty with this is that the current Innova lateral flow tests are not accurate enough for anyone to be able to have confidence in a negative result, and thus don't really free anyone up.
If you get a positive test - for example if you are tested every week at your place of work, as an attempt to slow spread through asymptomatic cases - then yes, they are a good indication that you are positive, and indeed that IS a good thing in terms of reducing transmission.
however, if you get a negative test, this is not a particularly good indication that you are indded not infected. Depending on who does the test, even under optimum conditions only around 50-70% (and the latter only if administered by trained medical personnel) of people who are infected are identified.
That means that getting a negative test ISN'T any kind of indication that one can go about one's daily life without stringent SD, masks and handwashing, or indeed do something that is not at the moment allowed, such as mix inside. It's a really big limitation, and is why in the various scenarios it has been touted for - care home visits, in schools to replace isolation etc - regulatory authorities have repeatedly failed to endorse it.