Beltane Bash Pagans, witches, wiccans, druids and shamans gather at London's Conway Hall for an extraordinary celebration of the changing season. The Beltane Bash's parades have dancing bushes, medieval giants, live music, chanting and singing. Join in with a leafy green outfit.

London International Antique Dolls, Toys, Miniatures & Teddy Bear Fair Established for nearly 30 years, the London International Antique Dolls, Toys, Miniatures & Teddy Bear Fair attracts collectors and dealers from around the world. Now taking place at Dulwich College, find antique and new dolls, bears, miniatures and juvenilia.

Sci-Fi London Film Festival First held in 2002, the London International Festival of Science Fiction and Fantastic Film (to give it its full title) covers all genres. It ranges from premières of the latest blockbusters to a 48-hour film challenge for five-minute films, via all-nighter screenings.

The Flying Dutchman - English National Opera

In an English National Opera season populated by seabourne operas, Wagner's early success The Flying Dutchman heaves into view at the London Coliseum in Jonathan Kent's new production, conducted by music director Edward Gardner. James Creswell stars in the title role.

Lufthansa Festival of Baroque Music London's Lufthansa Festival of Baroque Music takes over the churches of St John's - Smith Square, St Peter's - Eaton Square and Westminster Abbey every summer. Concerts range from little-known gems of early 17th-century repertoire to large-scale masterpieces of the late baroque.