I'm the other way round to you, Matt - I live in Tier 2 but work in Tier 3. The difference is striking. People in the Tier 2 area where I live are better at following the rules than the Tier 3 area where I work.
My gym's in a Tier 3 area, and they've done a lot to try & ensure people remain safe, with a lot of extra cleaning stations put in. The one rule they have is you must wear a face covering unless you're exercising, and I can probably count on one hand the number of people who've obeyed this, excluding myself. Along with people gathering in the car park at work in the evenings (your typical car lovers who use the undercover bit of the car park to show off their engines) in gatherings of way more than six & not respecting social distancing, it's no wonder Staffordshire's in Tier 3 if this is replicated across the county, though I do accept this is more than likely just a microcosm.
Case in point regarding Staffs being in Tier 3: last Thursday, myself and my colleague had closed the petrol station down and were heading over the road to the main store before going home (there's usually a bit of cardboard & plastic to be put into the baler, plus waste milk from the coffee machine into the chiller to be removed & dealt with, and the keys are handed over). As is common, there were a number of cars in the undercover bit of the car park that I know didn't belong to colleagues - I'm unsure of the exact number, but it was almost certainly more than six. There were a lot of people, with no masks or social distancing. One of them, I later found out, has leukaemia, and I just had to facepalm at that. Why put yourself at even further risk? When we'd sorted out everything in store and had clocked out, we left the building, and the cars had left the undercover bit, but there were some blue flashing lights in the car park. We then realised it was a police car that had stopped a few vehicles which had been in the car park a few minutes previously. I'd hope some fines were doled out to people who were there.