A First Great Western InterCity 125 rolls down the gradient into St Davids station in Exeter. It wouldn't usually come along this route but the track is being relaid at Taunton so trains are being diverted via Yeovil Junction. This means they have to reverse at St Davids so 43131, which has been on the back from London Paddington, will lead the train as it continues westwards towards Penzance.