The North London Line is expected to reopen on Tuesday 1 June 2010 after being closed for three months for an engineering upgrade.

The closure has caused major disruption for many passengers as the replacement buses were completely inadequate to match the service offered by the rail line and did not serve Caledonian Road & Barnsbury station.

The £90 million upgrade involves work on more than 200 signals, 69 sets of points, lengthening 30 platforms for four-car trains and improving seven other stations.

CCTV, public address systems, lighting and passenger information screens are being improved. Some stations will get new signs, general refurbishment and new lifts.

Even now the engineering work is not finished. Weekend engineering work is scheduled to take place on most Sundays until May next year between Richmond and Gospel Oak, some weekends between Gospel Oak and Barking, and between Clapham Junction and Willesden Junction.