I'm not sure what your point is mate?
Both higher than Richmond and London though.
Gusibrough (290) is Tier 3, because it's in R&C UTLA (293) - Both of those rates are high, and in the worst 25% in the country
Nunthorpe and boro are similar, so same tier. Guisbrough west is 176, but is surrounded by worse, and still in R&C UTLA.
Richmond (169) is Tier 2, because it's in North Yorkshire UTLA (187) - Both of those rate are medium, and around 50% in the country
Obvisouly both Richmond and North Yorkshire are much better, so can warrant a low tier, if we're doing that.
If we have a tiered approach (which I agree with, now we're reducing), then there has to be lines drawn somewhere and as the lines are managed by UTLA then that's just the way it is. It's not perfect but I don't think managing too locally would work as well, as there isn't the capability to do it, and it would be much more confusing for some people.
Yes, there's going to be tier 2 and tier 3 next door to each other, it's unavoidable.