Where's the air bridge to San Serriffe? | Brief letters

Protective bubbles | Pandemic literature | Sculptural distancing | Johnson’s gestures | Visiting San Serriffe In the consideration of larger school protective bubbles, Geoff Barton may be correct that the logistics of keeping children apart will be “mind boggling” (Back to school: what can pupils in England expect from September?, 2 July) but monitoring bubbles could be greatly simplified by the use of different coloured hi-vis waistcoats, which are commonly worn by younger pup