High pressures squeeze and crush, but low pressures damage too. Losing the atom-level buzz that keeps us held safe in the balance of internal and external pressure releases dangerous storms, disorientation and pain, write ROX MIDDLETON, LIAM SHAW and MIRIAM GAUNTLETT

BARRY JACKSON has been a firefighter for nearly 30 years. As a member of the London Fire Brigade (LFB), he was one of the first to attend the horrific Grenfell Tower blaze, which devastated a west London tower block six years ago today.
The terrifying fire killed 72 people, injured at least as many and left hundreds homeless. The impact on the local community in North Kensington, where the very poor live streets away from the very rich, was massive.
But for Jackson, a workplace health and safety rep, the tragedy was another reminder of the inadequate – and sometimes non-existent – protections for firefighters as they risk their lives to save ours.