Table 1.7 in the Vital Events Reference Tables also contains some comparisons of age-standardised rates for the countries of the UK.
Further information for the rest of the UK can be found via the following links:
England & Wales - the annual ‘Mortality Statistics’ release, available via the Office for National Statistics website, includes death rates, for a number of causes of death, which have been age-standardised using the European Standard Population.
Northern Ireland - the numbers of deaths from various causes are given in the Annual Report of the Registrar General for Northern Ireland, which is available on the Northern Ireland Statistics and Research Agency (NISRA) website, together with some more detailed tables on various causes of death. However, those statistics do not include any death rates from particular causes which have been age-standardised using the European Standard Population.
Note: Figures for England & Wales and/or Northern Ireland may not always be on exactly the same basis as National Records of Scotland (NRS) figures: there can be differences in the coverage of what at first sight appear to be the same statistics.