| Description | Milborne Port Gas; Milnthorpe Gas Coal Coke & Lime; Minehead Gas-Light & Coke; Mirfield Gas; Misterton & West Stockwith Gas; Moffat Gas Light; Mold Gas & Water; Monmouth Gas & Water Works; Montrose Gas; Morley Gas; Mossley & Saddleworth Gas; Muirkirk Gas Light; Mundesley & Holt Gas; Musselburgh Gas; Nairn Gas Light; Nantlle Vale Gas; Nantwich Gas; Neilston Gas Light; New Cumnock Gas; New Romney Gas Light & Coke; Newbiggin-By-The-Sea Gas, Newburgh Gas; Newcastle-Upon-Tyne & Gateshead Gas |