A member of the Labour Party claims she has been threatened with disciplinary action after refusing to acknowledge the gender identity of a trans woman.

The Telegraph reports  that Janey Hutton received a warning letter over a comment she made in a closed Facebook group in which she said transgender women were men.

'Its (sic) painful to see biological women say trans women (men) are sisters. The desperation to appear PCWOKE is vomit inducing. These are MEN,' she wrote.

In the letter sent to Hutton on October 18, the head of complaints at Labour's National Executive Committee, Sophie Goodyear, said the comments were 'offensive'.

Goodyear also reportedly warned that 'abuse of any kind, whether direct attacks or pejorative language which may cause offence is not acceptable and will not be tolerated in our party'.

According to The Telegraph, the letter went on to warn that similar comments in the future may result in disciplinary action.

'I am therefore writing to remind you that describing those who identify as transgender women as men is not what we would expect from a member of the Labour Party and ask that you refrain from making comments of this nature in the future,' the letter read.

'Please be aware that any repeat of this conduct may lead to formal disciplinary action.'

Ms Hutton then complained to Labour that her right to freedom of belief had been breached.

'I am not under the delusion that humans can change sex. This is my belief and therefore I have this right not to have my belief invalidated by your dogma,' she reportedly wrote.

'This is also ECHR Article 9 as my FREEDOM NOT TO BELIEVE in your ideology.'

The Telegraph reports that she is yet to receive a response to her complaint.