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
Comment: How to avoid the pitfalls of MedTech
Excellent run through of the travails of innovation in medtech. Talk to people on that path in the UK and they will recount the hassle that goes with...