Https://www.ons.gov.uk/peoplepopulationandcommunity/birthsdeathsandmarriages/deaths/dataset/deathsbyvaccinationstatusengland
Can you be more specific with your claim? The age-standardised mortality rate appears to be significantly higher for the unvaccinated population according to your source.
// edit: Sorry, I missed the part where you were talking about a specific age group. This can be explained by [1].