Sally Rooney's books may also be pulled from sale in the UK

The Normal People writer told the British High Court that her previous work may also be pulled from sale in the UK.

According to reports, Rooney fears that any publishers and producers who work with her could be committing a criminal offence due to her vocal support of Palestine Action.

"If Palestine Action is still proscribed by the time my next book is due for publication, then that book will be available to readers all over the world and in dozens of languages, but will be unavailable to readers in the United Kingdom simply because no one will be permitted to publish it, unless I am content to give it away for free."

Rooney stated, "If I were to write another screenplay, television show or similar creative work, I would not be able to have it produced or distributed by a company based in England and Wales without expressly or tacitly accepting that I would not be paid."

"If, therefore, Faber and Faber Limited are legally prohibited from paying me the royalties I am owed, my existing works may have to be withdrawn from sale and would therefore no longer be available to readers in the UK."

She said this would be "a truly extreme incursion by the state into the realm of artistic expression".

Earlier this year, Rooney was told she was at risk of committing a terror offence after she vowed to donate the earnings from her books and the adaptations of her work to Palestine Action.

In July, the Home Office decided to proscribe Palestine Action under anti-terror laws.

Those who are members or support Palestine Action could face 14 years in prison.

Rooney has been incredibly vocal about her support of the activists and has stressed that they are "plainly not a terrorist organisation."

Co-founder Huda Ammori is now taking legal action against the Home Office.