Sir, Helicopter pilots flying along the river have known for many years that hot air emanates from the Palace of Westminster (report and photograph, February 16), producing an area of turbulence. It never fails to produce a wry smile and a comment.
Yours faithfully,
IAIN McCOUBREY,
12 Mill Paddock, Letcombe Regis, Wantage OX12 9JE.
February 16.