I had to travel to spain last week to manage some construction work. I returned on a flight into Manchester airport last night having duly filled in my form to report where I would be spending my quarantine. I chatted to a large family on the plane who hadn't completed their forms and told them that when I flew in a few weeks ago , you could complete the forms on landing.
We were all surprised to find that no one was asked to show their forms or details at all. The family I had been talking to felt this meant they would be in no official list that they had travelled and as such didn't need to quarantine!!
Let me just add that on arrival to spain last week all forms were checked and random passengers were even temperature checked at a designated medical checkpoint.
Why do we as a country set these rules to a press fanfare and then not thoroughly enforce them??