LONDON, ENGLAND - MAY 04: Artists perform during the Arcadia 10th Anniversary Metamorphosis show rehearsals at Queen Elizabeth Park on May 4, 2018 in London, United Kingdom. Local residents and 200 schoolchildren watched a preview of Arcadia's Metamorphosis show after an evening of art and engineering workshops ahead of this weekend's festival at Queen Elizabeth Olympic Park. Arcadia started as one of the many stages at Glastonbury Festival. The 50 tonne Arcadia Spider is built from repurposed military hardware, is one of the world's most iconic festival stages. (Photo by Simone Joyner/Getty Images)