The ruling means transgender women with a gender recognition certificate (GRC) can be excluded from single-sex spaces if ‘proportionate’.

The Scottish Finance Secretary said there are no plans to bring forward new, revised gender reforms at the Scottish Parliament.

The Prime Minister has faced repeated questions over his definition of a woman in the five years since he became Labour leader.

The studies also ‘offer hope’ that transplanted cells could tackle symptoms of the condition, such as tremors.