4.110 At aerodromes with air traffic control service, when helicopters land or take-off at locations not on the manoeuvring area (e.g. apron, maintenance area, sites adjacent the aerodrome), or locations not in sight of the VCR, or unlit locations at night, the appropriate phrase ‘LAND AT YOUR DISCRETION’ or ‘TAKE-OFF AT YOUR DISCRETION’ shall be used to authorise the manoeuvres. Relevant traffic information on other aircraft (airborne or on the ground) shall also be passed and the name of the designated landing/departure point/area should be stated.
Perfectly acceptable in a controlled environment.