Your article on Qinetiq's Sentry surveillance craft (The Big Picture, 1 October) was interesting.
Amusingly the photograph accompanying it (perhaps because it was a sea trial) shows this vessel of 'speed and agility' displaying the internationally recognised shapes for 'a vessel restricted in its ability to manoeuvre'.
Martin Figg
Weymouth
Mandate sets 2030 date for use of sustainable aviation fuel
I do hope this doesn't cause costs to UK aviation to rise and lose business to those staying on fossil fuels.