My neighbour has recently had a new gas central heating system fitted & has moved his boiler to a different part of his house. I came home last night to find a copper gas pipe running from the gas meter box situated on the side of his house & 10 foot from my property, running up the outside of his house & then bent over and around the downpipe of his guttering then running along the back wall of his house & then in through the wall into his kitchen & presumably to his boiler. This pipe is an eyesore but I'm more worried about any safety implications - are there any rules governing how gas pipes run from a meter into a house, I've never seen one routed in this manner as they're usually run inside from my experience, is it safe like this ?, any expert advice would be greatly appreciated.