Royal watchers believe Prince Harry and his girlfriend Cressida Bonas may announce their engagement this year. Miss Bonas accompanied the 29-year-old prince to two official engagements in the past few days, complete with very public displays of affection.

They have previously avoided being photographed together, so must know that these appearances will only increase speculation that their relationship is getting more serious.

Now it is rumoured that Harry will take her to Balmoral in Scotland this summer to meet the Queen. The 25-year-old daughter of 1960s model Lady Mary Gaye Curzon and Old Harrovian businessman Jeffrey Bonas, will need the 87-year-old monarch's approval before joining the royal family.