HERE’S a mystery:

Pippa Middleton’s louche brother-in-law, Spencer Matthews, and his wife, the Irish model Vogue Williams, were thrilled when Hello! agreed to pay them a fortune for exclusive photographs of their wedding.

The magazine was so proud of its exclusive that it sent stern warnings of dire legal consequences if any rivals dared to publish unauthorised pictures. However, four weeks after the ceremony at the Matthews family’s Glen Affric Estate near Inverness, Hello! has still not brought out the snaps.

Editor-in- chief Rosie Nixon is keen to deny suggestions that the deal collapsed after prominent guests refused to be included. She tells me: ‘How, what or when we publish stories is a matter for us.’