The age distribution of cases isn't surprising, given that vaccination started with the oldest people and worked down towards the youngest, both UK and here, the older groups have higher vaccination rates. See figure 3 (this document gets updated weekly) https://www.publichealthontario.ca/...-vaccine-uptake-ontario-epi-summary.pdf?la=en
The age distribution of Delta cases in the UK looks very similar to the general (not specific to Delta variant) distribution of covid19 in Ontario. https://files.ontario.ca/moh-covid-19-report-en-2021-06-23.pdf
The age distribution of Delta cases in the UK looks very similar to the general (not specific to Delta variant) distribution of covid19 in Ontario. https://files.ontario.ca/moh-covid-19-report-en-2021-06-23.pdf