00:00Passengers on the northern line have faced almost a week of chaos because of the signal
00:06failure here at Stockwell station. Now trains are running as you can see one's just arrived
00:12here behind me but the frequency is much reduced this one's going up to high bar lift but there
00:17are only maybe around seven or eight trains an hour compared to more than 16 at normal times.
00:22Now how long is this going to take to resolve? Well as it fills the afternoon we don't know the
00:30answer to that question. TfL says its engineers will be back here tonight. They have been here
00:35each night of the week but they simply don't know what's causing the problem. It means that
00:40the computers in the control room are not talking to the computers on the train and therefore the
00:46drivers on the train are having to talk by radio to the line controllers. That means the trains are
00:51running much more slowly through the area. It is safe and trains will keep running but
00:57as it stands we don't know how long this problem is going to last.
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