500ft rule
LD max "during practice don't forget you are NOT absolved from the low flying rules: in particular "Not within 500 ft of any person, vehicle, vessel or structure except when taking off or landing according to normal aviation practice."
This means that unless you are conforming to the normal traffic pattern of an airfield, and are making standard calls to that airfield, and (if a controlled airfield) you have received clearance to land, you MUST plan to go-around at or above 500ft agl".
Except the 500' applies to horizontal as well as vertical distance. I.e. you can descend down to ground level in the open FIR...as long as you keep 500' away from an structure person etc. ) i also apply this to cattle in real life). There is no reason to restrict PFLs to 500'...some examiners wont! Just watch out for obstacles and buildings on the climb out!