Vanessa Maxwell knew how to throw a party. It was her greatest contribution and would doubtless be her lasting legacy to those who had known, if not loved her, long after she was gone.

      The first rule was that they were almost always held on the spur of the moment. Unlike some hostesses who sent out invitations a month in advance, Vanessa understood that the success of the entire venture depended upon the delicate relationship between anticipation and fulfilment; too long a wait between one and the other resulted only in indifference and boredom. And any event that didn’t demand the frantic re-juggling of previous commitments, a trail of white lies and the testing of long-held personal loyalties wasn’t worth attending.

      Secondly, she was ruthless about whom she invited. She almost never returned an invitation with one of her own. In fact, she was famous for picking people she’d only just met, pairing them up in unlikely, possibly incendiary ways. She tossed elder statesmen next to starlets, seated royalty across from working-class playwrights; once she sent her chauffeur to the Florida Club only to return with an entire jazz ensemble plucked off stage and half a dozen dancers from an all-male burlesque review in Soho to ‘liven things up a bit’.

      Lastly, her events were held in rooms far too small, far too bright. People rubbed up against one another, jostled for space, occasionally landed in one another’s laps. While any other hostess would lull her guests into a coma with soft lights and deep comfortable sofas, Vanessa demanded that everyone, regardless of age or position, wedge themselves into a cramped pub in Shepherd Market, around the slippery border of a public swimming pool or onto the balcony of a private club. People shouted to be heard, grabbed at the drinks floating by on silver trays, eavesdropped shamelessly on intimate conversations as they allowed their hands to wander, brushing up against the warm limbs of strangers.

      There was an air of danger to her gatherings; the frisson of mischief. At her most famous dinner party she hired a sprinkling of actors to pose as staff and one as an unfortunate guest who was then dramatically poisoned during the first course. It was then up to the remaining guests to solve the mystery before the police arrived or they themselves were eliminated through one heinous end or another.

      It was just this kind of daring enterprise that had catapulted her and, by default, her husband, businessman and tobacconist Phillip Maxwell, to the top of the London social scene.

      Grace had never been invited to one of Vanessa’s parties before; to say they didn’t travel in the same circles was putting it kindly. Grace’s husband Roger knew Phillip Maxwell professionally and had known Vanessa before either of them were married. But Grace, coming from Oxford, was still an outsider.

      Mallory, however, had been twice before; a distinction she both relished and pretended not to notice. She’d been the first to fall into the water at the famous midnight pool party and charmed everyone with the nonchalance with which she proceeded to wear her sopping wet gown, transparent and clinging to her admirable figure, for the rest of the evening.

      Tonight, however, was a relatively simple affair by comparison. As loyal members of the Tory Party, the Maxwells were hosting a campaign fundraiser aimed at securing Anthony Eden as prime minister. Eden, appointed Churchill’s natural successor upon his resignation, had called a general election for 26 May and his pledge that ‘Peace comes first, always,’ struck a chord with a nation weary from sacrifice and loss.

      To highlight this dawning age of prosperity, Vanessa had organized an impromptu ‘Summer Fete’ in the Orangery of Kensington Palace, with traditional entertainment and food, including a coconut shy, dunk tank, horseshoes, egg-and-spoon races, jugglers and even pony rides, while vats of Pimm’s, strawberry ice, caviar tarts and champagne made the rounds. The only difference was that the tickets were purchased in pounds rather than pennies, and the stalls were manned by famous faces from the stage and screen.

      As soon as they entered it was clear from the crush of bodies that most of fashionable London was in attendance. A large banner with the slogan ‘United for Peace and Progress’ hung across the entrance. People were shouting and waving to one another across a sea of faces; smoke clouds hung thick and heavy; the constant throbbing tempo of a brass band could be heard pulsing like a heartbeat beneath the general roar.

      Holding each other’s hands, the two girls slipped through the crowds.

      ‘Can you see her?’ Grace scanned the long gallery.

      ‘She’s over there!’ Mallory shouted back, waving to a small, dark-haired woman, surrounded by people on the other side of the room.

      She dragged Grace through the throng.

      ‘Vanessa!’

      Vanessa turned round. Dressed in a gauzy evening gown of layered black chiffon, she had sharp, even features and rather small, deep brown eyes. Although not very tall, she was so delicate and perfectly proportioned that despite her unremarkable face she could only be described as exquisite. Next to her, other women appeared suddenly bedraggled and bovine. Her manner was relaxed; almost bored, as if she weren’t greeting her guests so much as auditioning them. And every detail of her person was flawlessly finished – from the smooth centre-parting of her hair drawn back behind her ears to reveal a pair of magnificent emerald clips, to her long, slender fingers, accented with creamy, pale polish, the precise translucent shade of the small cluster of rosebuds that adorned her waist. Vanessa smiled, taking a long, slow drag of her cigarette. ‘Welcome, ladies! I hope you’re feeling lucky. There’s a tombola that includes a ladies’ gold watch from Asprey and the tickets are going like hot cakes. That new comedian Benny Hill is hosting the auction.’

      ‘The one from the television?’ Mallory’s eyes widened.

      ‘The very same. And let me tell you, he’s nothing like that in real life!’

      ‘How did you manage it?’

      ‘The same way I manage anything – through sheer unrelenting gall.’ She turned to Grace, looking at her steadily from beneath hooded lids. ‘I don’t believe we’ve had the pleasure.’

      ‘Oh, I want you to meet my friend, Grace Munroe. Roger’s wife.’

      ‘Hello,’ Grace held out her hand. ‘And thank you for having me. This is simply … well … incredible!’

      Vanessa received Grace’s fingertips with a squeeze, tilting her head to one side, ‘So, you’re Roger’s wife. We were all wondering where he’d disappeared to.’ Taking another deep drag, she regarded Grace with frank curiosity, as if she were a rare specimen on display in a museum. ‘You’re related to Lord Royce, aren’t you?’

      ‘He’s my second cousin on my mother’s side. He inherited the title when my grandfather died.’

      ‘I see.’ Vanessa exhaled, a long thin stream of smoke shooting from her nose. ‘You’re quite pretty, aren’t you?’

      Grace blushed a little, feeling suddenly gauche; like a child who’d been trotted out before bedtime to entertain older relatives with their good manners. ‘Thank you.’

      ‘And where is your husband tonight?’ Vanessa asked

      ‘In Scotland. On business.’

      ‘How terrible for you. Or,’ she arched an eyebrow, ‘perhaps lucky. I know I’d be euphoric if Phillip went away.’

      ‘You’ve