I think the figures have always included Scotland’s and NI’s additional deaths. It was England’s and Wales’ that were missing up until about 25 April. I believe they’re all counted now from all countries.
What’s not included is all the excess deaths which could potentially double the figure but there will be indirect effects included in those excess deaths. The same applies to all countries though.
The country that’s most likely to overtake us is Russia but they’re not including people with underlying conditions so their reporting is grossly understated, so we’ll never know.