Today: The Big Scuba Show is at London Olympia until tomorrow. Visitors to the exhibition can expect question-and-answer sessions with experts, try-dives, a photography display and virtual free-diving, as well as stalls selling scuba kit, plus competition giveaways ( thebigscubashow.com).
This week: A week-long celebration of the Hogwarts Express (the steam locomotive from the Harry Potter films) is under way at the National Railway Museum in York. As part of Wizard Week you can take steam rides behind the locomotive and watch wizards perform ( nrm.org.uk).
In Miami Beach, the South Beach Food and Wine Festival is in town from Thursday to Sunday with star chefs including Alain Ducasse, Anthony Bourdain and Charlie Trotter, as well events that cover anything from home cocktail-making to "be your own barista" ( 2011.sobefest.com).
In the diary: Rio is the revived long-haul destination for Lufthansa from 1 November, five times a week from Frankfurt with good UK connections ( lufthansa.com)
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