The secrecy will ease, up to a point. He will apply for patents, for a start. His rigid business practices have also softened, he says. Now he just wants to market it. 'We were used to selling a ton of this here and there. But this got too big for us.' Now, he's keeping things simple. There is still secrecy, in the form of ongoing negotiations with an Indian company to make an unnamed product (according to Greenbury) and with an airline manufacturer (according to Ward). There is still invention, in the form of a hollow-core Starlite-coated fire-door which weighs 25kg, compared to the usual 70-80kg: 'And it doesn't leak halogens all the time, like most doors.' His concrete plans aren't grand – he wants to get a local manufacturer to make the doors – but the door might be grander, being a response to criticism that his invention is so profoundly important, he should have given it to the world long ago. 'A lot of people have been saying that I'm a rotten prat and that I'm greedy and I should give it to the world.' Other critics have objected to his talks with defence companies. 'That's one of the reasons I've tried to stay keeping hold of things. I've said it often enough that we'd like to give protection but not to cause devastation.'