168003 brings up the rear of the 5A99 17:15 Banbury to Aylesbury Chiltern Railways ECS, as it approaches Kings Sutton on 2 July 2025. This VSTP working was running 68 minutes late. Unfortunately I didn't note the number of the leading unit. Both DMUs are in the latest version of Chiltern's livery, but the leading unit looks especially clean, as if its on its way back from refurbishment. Any help with the ID would be gratefully received.