The UK transgender population is estimated at between 200,000 and 500,000

Everyone aged 16 and over will be asked in the 2021 census if they wish to declare their gender identity. There will also be a new voluntary question about sexual orientation.

The move comes after the Government Equalities Office said no robust data on the UK transgender population existed. It estimates the number at between 200,000 and 500,000.

Since the 2004 Gender Recognition Act, 4,910 trans people have been issued with a gender recognition certificate confirming a change to their legal gender.

This has entailed a medical diagnosis of gender dysphoria, a report from a doctor about any medical treatment and proof of having lived in the acquired gender for two years. Also required are a promise to live in the new gender until death