Extreme performance demands extreme testing. For a dive watch developed for a ‘specialist branch of the military’ that means finding somewhere deep, cold and dark which is why a trip to the world-famous ship wrecks that lie off Malin Head on the NW coast of Ireland seemed like the ideal test ground.

The brief for the Holton Professional watch was to be able to withstand some of the most hostile conditions imaginable, be operated by a single gloved hand and comply with the exacting requirements of a very specialist user.

Read our full review of this top notch, soon to be issued watch

What was the last piece of equipment, developed or used during WWII, still in service with HM Forces. I am not just thinking of weapons and aircraft, but vehicles, plant, field catering equipment, and anything else you can think of.

There have been lots of suggestions; Mark 8 torpedo: Developed before WW2, this was still in Royal Navy service into the eighties, and was used in 1982 to sink the Argentine cruiser ARA General Belgrano. SMLE No4 Mk1: Still sniping away in the eighties, nearly a whole century after the first Lee Enfield rifles entered service. Gloster Meteor: Strictly speaking not in RAF service, but still working for a living doing defence work, testing ejection seats for Martin Baker.

The suggestion of the humble clasp knife may well be the one to beat though ....