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
Massive new Coventry campus targets 60GWh battery output
Where will all the raw materials come from for the manufacturing process? How will they be transported to the factory and what is going to be done with the various scrap and residues?