What are you doing training in a 14 year old lorry? ie. 58 plate.
You should have booked with the forum sponsor, PSTT
Bus drivers shouldn’t need much extra training to pass LGV Category C or what used to be called HGV Class 2.
You are used to using mirrors and taking enough room for a 2.5 metre wide vehicle, and also being aware of its length and tail swing.
However, with lorries you do have to be more aware of low bridges if you are coming from driving set routes…as set bus routes won’t have bridges lower than the bus.