In fifty years of 'linesiding' I had not seen this before. Open Train Times was showing a signal fault at Bay Horse on 12th August 2022 and it was clearly affecting PN199 at Scorton too. I thought perhaps a remote reboot was applied as soon afterwards it illuminated normally and shortly after that a Pendolino passed at normal speed. I'm advised though that the signals are not computer based and this was more likely a power supply blip.
Location: Wyre Viaduct
Original line: Lancaster and Preston Junction Railway
Photographer: Mark Bartlett
Contact photographer: Mark Bartlett
Date: 12/08/2022
Image number: 82153