Yes. Every engineer on the van is Gas Safe registered (register number 953527) and LPG qualified. That matters more than it sounds, because a lot of 'plumbing' jobs actually touch a gas boiler, an unvented hot water cylinder, or a gas appliance — and only a Gas Safe registered engineer is legally allowed to work on the gas side. Using a single engineer for the whole job means you're not juggling two trades or paying two call-outs.