Agree, it's completely confusing and few people understand what we are meant to be doing now, even in places not subject to local measures. My wife and I were discussing last night whether "bubbles" are still a thing or if that was all scrapped with the rule of 6. We're not sure (not that I paid the blindest bit of attention to that nonsense in the first place).
They should re-emphasis the national alert level system, and produce a similar one for local measures. Then if nationally we are at 3 and you go into an area that's at local level 4 or 5, you know exactly what is expected.
As for people being confined to Caerphilly or RCT or the north east of England, it's completely and utterly unenforceable unless people are spotted with a car full of beach toys and two kids.