Denis' top three
Favourite engineering innovation: The internal combustion engine. It has stood the test of time, despite its days now being numbered. I am sure that the innovative technologies which replace it, that IMechE members are now developing, will play a massive part in helping us move to a carbon free economy by the middle of this century.
Person I most admire: Most engineers are incredibly modest, and keep themselves out of the limelight. So we probably don’t even know the identities of the people who are really changing the world. So I just pay tribute to all of them, quietly going about their business in a modest and unassuming way.
Greatest challenge facing engineering: Closing the gender gap, and having as many female engineers as there are female doctors in the NHS.