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1940.13 London & North Eastern Railway and London Passenger Transport Board. Electrification of tracks and extension of L.P.T.B. (Northern line) trains from East Finchley to High Barnet (L.N.E.R.)
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1940.RR330 L&NER High Barnet. Bringing into use new signal box and installation of colour light signalling
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1971.08(1) Northern line. High Barnet Alterations to signalling. Operative from Sunday, 21st March
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1971.31 Northern line. Automatic control of signalling at High Barnet with supervision from Cobourg Street control room
