<strong>ROTUNDA<br />90 York Way, N1 9AG, tel: 020 7014 2840</strong><br />As part of London&rsquo;s Oyster Festival, there will be oyster masterclasses through October, plus a menu that includes oyster tempura and onuga caviar; oyster and scallop ravioli and Guinness and oyster pie, alongside a good range of natives.<br /><br /><strong>BENTLEY&rsquo;S<br />11-15 Swallow St, W1B 4DGT, tel: 020 7734 4756</strong><br />Go for half a dozen Maldon Rock oysters and a glass of perfectly matched Muscadet for &pound;9.95. Otherwise, there&rsquo;s heaps of Atlantic prawns, chilled lobster, smoked salmon, shellfish bisque and other goodies at this classic seafood restaurant.<br /><br /><strong>GREEN&rsquo;S<br />14 Cornhill, EC3V 3ND,</strong> <strong>tel: 020 7220 6300</strong><br />Green&rsquo;s oyster platter is a selection of 12 little beasties, including Loch Ryan natives, Carlingford Lough rocks and West Mersea rocks and natives, and costs &pound;27.25 &ndash; be sure to wash it all down with a glass of Laurent Perrier.<br /><br /><strong>ST PANCRAS GRAND OYSTER BAR<br />St Pancras International, Pancras Road, NW1 2QP, tel: 020 7843 4250</strong><br />Throughout October, there&rsquo;s a stonking choice of British rock oysters &ndash; from Carlingford Lough in Ireland, to Northumberland Lindisfarne, to Scottish Cumrae to Maldon and Colchester. There&rsquo;s nothing fancy: garnishes are lemon juice, Tabasco and mignonette (shallots and vinegar sauce). Champagne starts at &pound;8 for a glass of house fizz.<br /><br /><strong>SHEEKEY&rsquo;S OYSTER BAR<br />28-32 St Martin's Ct, WC2N 4AL, tel: 020 7240 2565</strong><br />Offerings are Strangford Lough Rocks, West Mersea Pearls, Fines de Claire and West Mersea Natives and an intense dish of mixed oysters with spicy boar. For &pound;15 you can have a glass of Theophile Roederer Champagne and half a dozen West Mersea Pearls.<br /><br /><strong>WRIGHT BROTHERS<br />11 Stoney street, SE1 9AD, tel: 020 7403 9554</strong><br />You&rsquo;ve got all your regulars &ndash; Maldon, wild Colchester, Duchy of Cornwall, Cumbrae, Lindisfarne &ndash; plus specials such as oysters with wasabe, spinach, chorizo and so on. All are delicious, sometimes shockingly so given the unusual ingredients.<br /><br /><strong>LE BOUCHON BRETON<br />8 Horners Square, E1 6EW, tel: 020 7738 0307</strong><br />Le Bouchon are holding oyster masterclasses through October. Ten varieties will be paired with wines as the head waiter, from La Rochelle on France&rsquo;s Atlantic coast, takes you through the tastes and the correct way to prepare them.