Dr. Neil Walker:

I am talking about physical or contractual insecurity. We hope that Brexit will be orderly and that mutual co-operation will survive but if not, we will be relying on a treaty. We do not know if Britain will stand over treaties which predate the Single Market rules. A significant amount of money is being spent twinning the pipes from Scotland but the gas comes off the Transco system at one point: Moffat. If something were to happen there - God forbid - we would be in serious trouble because that is the route which currently supplies 60% of our gas and will supply 100% of it in the future.