No 10 has warned Sally Rooney risks committing a terrorist offence after she vowed to use earnings from her books and BBC adaptations to fund Palestine Action.

The Normal People author said she would donate earnings from her work to support the group, which was recently proscribed as a terrorist organisation in the UK.

'I feel obliged to state once more that – like the hundreds of protesters arrested last weekend – I too support Palestine Action,' she wrote in The Irish Times.

'If this makes me a 'supporter of terror' under UK law, so be it,' the 34-year-old added. 'My books, at least for now, are still published in Britain, and are widely available in bookshops and even supermarkets.

'In recent years the UK's state broadcaster has also televised two fine adaptations of my novels, and therefore regularly pays me residual fees.