Father Ted writer Graham Linehan is involved with the campaign, having had a Twitter row with a trans activist

People warned by the police over comments they made about transgender issues are launching a pressure group and legal action next week, challenging “Big Brother interference” with their free speech rights.

The Fair Cop campaign is headed by Harry Miller, 54, from Lincolnshire, who was visited at work in January by Humberside police for retweeting a limerick that said trans women had silicone breasts. The force admitted there was no crime, but described it as a “hate incident” and said it would be monitoring Miller’s and his wife’s social media accounts.

Others involved include the Father Ted writer Graham Linehan, who was given a police warning after getting into a row with a trans activist on Twitter; the journalist Caroline Farrow, who was threatened with