Come watch the “Darwin’s Nightmare” documentary by Hubert Sauper with me on Friday night. It’s on at the Serpentine Gallery Pavilion, Hyde Park from 8pm (£5).

“Sauper’s film examines the 1960s experiment that introduced Nile Perch fish into Lake Victoria, the largest African lake shared by Kenya, Tanzania and Uganda. A voracious predator, the Nile Perch extinguished almost the entire stock of the native fish species. However, the new fish multiplied so fast that its white fillets are today exported all around the world. Huge, hulking ex-Soviet cargo planes come daily to collect the latest catch in exchange for their southbound cargo of Kalashnikovs.”