securespark, i think gas services must be 150 mm from accessories, cu, switches etc or 25mm from a cable, unless gas or cable provided with an intumescent/insulating surround. I got my part p assessment on 17th nov and realised a light switch in meter cupboard was too close. OSG page 18 and 62. though 7671:2008 528.3.2 to 528.3.4 does not state this explicitly