Why has the UK been so slow to vaccinate children against covid-19?

Compared with other high-income countries, the UK has been slow to approve and roll out covid-19 vaccines to teenagers, prompting concerns over long covid and the new omicron variant

Why has the UK been so slow to vaccinate children against covid-19?
Compared with other high-income countries, the UK has been slow to approve and roll out covid-19 vaccines to teenagers, prompting concerns over long covid and the new omicron variant