66143 passes Uffington on 3 July 2026 with the 6B33 13:52 Theale to Robeston empty oil tanks. A bizarre signalling decision saw this train let out of the loop at Challow right in front of the 1C18 14:30 Paddington to Weston-super-Mare GWR service, which was severely delayed, and then crawled by at slow speed by a few minutes later.