dont do it mate iv got both my c and c+e nightmare i decided to do it as i was board of been a sparky less than 18months of passin im back on the tools hated it after a few months to many gears etc and then theres alway the traffic cars dont care that your runnin 44ton round late break etc really does wind you up its good to have as a back up but look into plumbin or sparky courses may cost slighty more nut then if you wanna do both parts of your hgv it would work out the same.