Track circuit signalling systems are widely utilised across the world, and their ability to accurately detect trains is crucial for the safe and smooth operation of a railway network. These systems use electric circuits to detect the presence or absence of trains in sections along a railway line, as such, they can be susceptible to interference from geomagnetically induced currents.

The model we have developed to analyse the impacts of space weather on the UK railway network has been expanded to include new arterial routes across Great Britain.

Results from the model, including case studies of historical extreme events will be presented.