Upon browsing the Internet I stumbled upon a couple of downloadable PDFs, first one being the official DSA Guide To Driving LGV’s;
ribblevalleyhgv.com/sitedocs … es_DSA.pdf
And the second being the Driver CPC official DSA guide;
ribblevalleyhgv.com/sitedocs … _guide.pdf
I hope the links work, both taken from here near the bottom of the page;