That is of course excellent news, but the UK still produces around five tons of CO2 per capita, about 20% more than France, and about three times as much as India. The effort mustn't stop now.
The atmosphere doesn't care about per capita. Absolute numbers are what counts and then India doesn't look so good.
What is more absolute than one human one share?
The atmosphere doesn't care about political boundaries either, so there's not much utility in drawing a line around an arbitrarily large group of people and summing their emmissions. The only reason to look at country-level stats at all is to assess the effect of policy, and controlling for population size is the correct approach for that comparitive analysis.
Why point at someone else when you have your own problems to fix?