Get the stories that matter to you sent straight to your inbox with our daily newsletter.An investigation has been launched after a gas network firm claimed council contractors drilled a borehole close to a main pipeline in Dumbarton.Balfour Beatty, which carried out the works on behalf of West Dunbartonshire Council, said it is looking into the claims made, with a full probe underway.Gas network company SGN told the Lennox Herald the hole had been drilled in “close proximity” to their gas