“This event will be attended by the British Prime Minister, the First Ministers from Scotland and Wales, and the First Minister and deputy First Minister.
A Sinn Fein spokesman said on Wednesday: “As First Minister, Michelle O’Neill has been invited to a political engagement in Windsor Castle, hosted by the British King today, Wednesday 12th February.
The event comes after Sir Keir and Deputy Prime Minister Angela Rayner joined Charles on a rare joint engagement in Cornwall to see a sustainable housing project which was inspired by the monarch.
Prime Minister Sir Keir Starmer, as well as devolved leaders from Wales, Scotland and Northern Ireland, have been invited the event, it is believed.
In April 2023, as Leader of the Opposition, Sir Keir attended a so-called “dine and sleep” evening, also at Windsor Castle, the first of the King’s reign.