LGV Blindspot check On DVSA Test

Passed Class 2 in 2001 & Class 1 in 2006 and was taught by two different instructors in two different areas of the UK, Class 2 in Worcester (Test in Gloucester), Class 1 in Merthyr (Test in Neath) and I was taught by both to look over right shoulder before pulling away. I was not expected or required to have my window open I’d just lean forward slightly and look roughly around 4 o’clock imagining that there was a clock face with 12 being eyes front dead centre (I’m 6’2" btw).