The VFR minima below 140 Kts is 1500 metres for aeroplanes and not specified for helicopters. In most cases the licence privileges will limit the pilot to 3 Km if operating on a UK issued PPL however, the holder of a PPL issued by a State other than the UK may not have the 3 K limit so they could use 1500 metres. The holder of a UK PPL or JAA CPL with a UK IMC rating is restricted to 1800 metres for take off and landing.