Osea is a private island off the coast of south-east England in the Blackwater Estuary. Popular with celebrities and film crews, it is also keen to host parties.
Four event spaces are on offer, including The Bomb Factory, a First World War barn that stored torpedo boats and ammunition. As it includes four square miles of fields, beaches and gardens, the venue can hold 1,000 standing, with the possibility of adding marquees. The smallest room is the Clubhouse, a converted chapel for up to 120 standing.
Mainland address: Osea Leisure, Goldhanger Road, Heybridge, Maldon, CM9 4SA
Contact: 0207 3846403
Refurbished in 2012, Spitbank Fort is one of three fortress islands in the Solent Forts collection, the other two being No Man's Land Fort and Horse Sands Fort.
The Officer's Mess, Crow's Nest and Victory Bar can all host events for up to 60 guests, with panoramic sea views. Fishing, cocktail making and poker nights are offered, and visitors craving a moment of peace can watch the sun set over the Solent tucked up in the sunken fire pit.
Mainland address: Solent Forts Port Office Canal Side, Portsmouth, Hampshire PO1 3FH
Contact: 0330 333 7 222
Slightly closer to central London is Queen’s Eyot, an island set in the Thames near Windsor. The venue is only accessible by boat and can host parties of up to 200 people with the addition of a marquee.
Guests can book out the entire island, which comes equipped with giant garden games. Food is prepared on the island and event planners can choose from barbecues, hot and cold buffets and a spit roast.
Mainland address: Queen's Eyot, Monkey Island Lane, Bray, Berkshire, SL6 2EA
Contact: 01753 832756
The fantastically named Lusty Beg is located in the heart of the Fermanagh Lakelands in Northern Ireland. More suited to groups looking for a relaxed corporate getaway rather than a lavish product launch, the site offers rustic spaces for meetings and conferences and a range of outdoor activities.
The island also features an organic spa.
Address: Lusty Beg Island, Boa Island, Kesh, County Fermanagh, BT93 8AD
Contact: 028686 33300
Burgh Island Hotel
Burgh Island in Devon was good enough for Agatha Christie and Noel Coward back in the day, and it has now been restored to its 1930s glory. It is surrounded on its tidal island by golden beaches, however flip-flops are frowned upon – the hotel encourages guests to dress in black tie for dinner.
Parties can be hosted at the venue for up to 50 guests. The venue comes with a roster of bands who can be hired to perform 1930s period, classical or jazz. Bar staff can also create a signature cocktail for each event.
Address: Burgh Island Hotel, Bigbury-on-Sea, South Devon TQ7 4BG
Contact: 02868 633300