Hawker, Avro, Supermarine, Rolls Royce, Armstrong Vickers, BSA, Webley and Scott, plus a whole host of manufactures who switched production from everyday products to weapons or items required for the war effort.
Raw materials?, women queued up to hand over their aluminium pots and pans, Town Parks were stripped of their wrought iron railings (still evident today), when we ran short of metal, we'd conceive planes made from wood like the Mosquito.
We were quite a resourceful nation, and a very determined people.