Fortunately, the distressed person was already in the best place to get help: the chemist.
London Ambulance Service sent a cycle responder to the scene, who tweeted:
“#stratford attended a patient with trapped wind in the chemist. Patient referred back to the pharmacist #999 #usewisely”
London Ambulance Service said that although the patient’s condition had improved when they arrived at the scene - believed to be either the Boots or Superdrug chemist in Westfield Stratford City - they still conducted a routine examination to make sure there was not an emergency.