The Duke of York and his ex-wife Sarah, Duchess of York, have inspired speculation they are to officially resume their public relationship after she joined him at the end of a working visit to Bahrain.

The Duchess, who has increasingly shared details of York family life on her Instagram account in recent months, stayed as a guest of the Crown Prince of Bahrain as the Duke's partner, it has been reported.

The pair have long emphasised their friendly relationship as co-parents to Princess Beatrice and Princess Eugenie, and have used recent family events including their daughter's royal wedding to put on a show of solidarity.

On Friday, the Duchess, Princess Beatrice and her boyfriend, joined the Duke in Bahrain to stay at the luxurious Ritz Carlton Hotel as a guest of the Crown Prince of Bahrain.

The Duke had been in the country for a working visit, undertaking engagements about his initiative Pitch@Palace and having dinner with the king.