You can find training providers in your region by searching online. You can also check providers through the Joint Approvals Unit for Periodic Training. It lists providers of refresher training for qualified large goods vehicle (LGV) drivers but many of these also offer initial LGV training.
LGV courses last from 1 to 3 weeks and cover driving skills, basic mechanics, and loading and securing loads. The test includes vehicle safety questions, manoeuvres like reversing into a loading bay, 25 miles of road driving and a theory test based on the Highway Code and LGV regulations.
It's recommended that you compare several providers before signing up to see what they offer and to make sure it fits your needs.