I was looking at the bit about dipped beam headlights:
SCHEDULE 4
PART I
Requirements relating to obligatory dipped-beam headlamps and to optional dipped-beam headlamps to the extent specified in part II......
2. Position......
(c) Vertical–
(i)Maximum height above the ground–
(A)Any vehicle not covered by sub-paragraph (B): 1200 mm
(B)A vehicle first used before 1st January 1952, an agricultural vehicle, a road clearance vehicle, an aerodrome fire tender, an aerodrome runway sweeper, an industrial tractor, engineering plant and a home forces' vehicle.......
Whatever it is, it's at roughly head height when driving a normal car
