Hailed as a Chelsea 'icon', property heiress Philippa Cadogan is known for giving pals tips on how to succeed in romance, including the edict that a first date should never last more than two hours. Well, it seems that her advice has paid off, for I hear that Viscount Chelsea's 28-year-old daughter is now engaged to a dashing Swede, Christian von Celsing, 28. Philippa is an interior designer whose grandfather, Earl Cadogan, owns much of Chelsea and has a £6.8 billion fortune Pictured: Philippa Cadogan wearing a Luella dress prior to the 18th annual Paris Crillon Ball Lord Chelsea tells me: '...