There is no second wave... You can't have a second wave until the first is gone.
In march the virus was spreading like a virus does and infecting millions across the UK, and we were testing 10,000 a day, now we have massively ramped up the testing to over 25 times that, and some local infections are appearing as expected with the relaxation of lockdown rules, as long as those numbers are manageable which for now they appear to be.
I just don't think people appreciate how many infections were active during March and April in the UK
If you are clinically vulnerable to this then you're doing the right thing shielding to keep safe but the other 99.74% are going to be just fine and need to carry on with their lives and learn to live with it