Thanks to all for posting some amazing images and photos, it was difficult to appreciate what amazing conditions it was outside - with all the festivities inside! This wasn't a day for close performance monitoring. I must also admit I thought there had been a lot more assistance on the northbound climb of Shap than the videos indicate, however this would appear to be an excellent heavy weight performance. We took just under 70mph onto the climb and were really flying with a tremendous noise, until quite a heavy slip which, whilst quickly caught, resulted in a notable drop in momentum. Speed then dropped below 40 and she really dug in as the videos show, with a minimum of 28mph at the summit. With the 47 appearing to be doing very little, this was a very good performance with such a load. The southbound run had a lot more assistance due to being looped and late running services, which ruined any proper climb. BIL is clearly a very capable loco which I think has yet to be properly tested.