An LNER Azuma has used the Eastern Gasworks Tunnel on the approach to Kings Cross for the first time this morning.
The easterly of the three portals of Gasworks Tunnel had been mothballed by BR when the track was rationalised in the 1970s, but has now been brought back into use to increase capacity in and out of Kings Cross.
https://www.lner.co.uk/news/lner-tak...e-in-40-years/
Tony