4.8K views · 52 reactions |  A delay in one part of Britain can affect trains elsewhere.  Disruption is more likely during busy times and on tightly scheduled routes. Initial delays affect local trains first, leading to knock-on delays if congestion builds:  https://www.networkrail.co.uk/running-the-railway/looking-after-the-railway/delays-explained/knock-on-delays/ #DelaysExplained | Network Rail | Facebook