There are a number of large gas mains below that section of Neasden Lane. The gas board identified a heavy leak to one of them and met with officers here (and the Police and bus operators) to decide what to do.
It was agreed that the leak needed to be repaired urgently and that the most appropriate solution was to install one-way working along a section of Neasden Lane (with traffic in the other direction following a diversion). Any restrictions on roads such as Neasden Lane are disruptive but it was decided that one way working would be safer and less disruptive. In this particular case the leaking mains presented a genuine hazard and there was no choice but to make arrangements to undertake the repair straight-away.
At the time when the arrangements were being made the extent and precise location of the leak was not known and it was envisaged that the repair might take a maximum of 10 days. The forecast repair time was based on limited knowledge about the size, location and condition of the gas mains in the area.
The repair proved easier to identify and repair than anyone envisaged. I am told that the repair will be completed today and that it is likely that the road will be completely open to traffic later today or tomorrow.