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The building has been inspired by a specific Virgin Holidays Wonderlist experience - the Lion Sands Game Reserve treehouse accommodation in South Africa.
Forming part of Virgin Holidays' Dream Bigger campaign, the 35-foot high structure features two rooms - a dining area and bedroom - complete with a bespoke South African design.
There is also a roof terrace that offers views across to St Paul’s, and individuals lucky enough to win the chance to stay in it overnight will receive their own private chef.
The installation will remain open until Thursday evening (28 January), and is being staffed around the clock by Virgin Holidays representatives, security and event organisers.
Agency M&C Saatchi Experience have produced the treehouse.
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