MIDAS VERDICT:

As a penniless graduate, Tucker sold chocolate mousse to delicatessens to make ends meet. A grafter by nature, he has been at the helm of SRT since 2008, steering the business through good times and bad. Now, SRT has a team of

100 people, including highly skilled British engineers who have developed a world-beating system of surveillance at sea. The shares, at 37p, are a buy, especially for the more adventurous investor.