iain-j
Member
The reason I asked the question in the first place was as far as my knowledge goes, was that when the South tunnel was being electrified some structural weaknesses were found and the tunnel was lined on the inside to strengthen it which meant it couldn't take double track any more. With it being singled it probably wasn't a problem but redoubling it would be a problem as a new tunnel would be needed.Any ideas why?
As I said I never had a definitive answer to this and this is the best of my understanding, hopefully somebody on here who knows the details to a better degree can help.
