The last time that I saw and photographed 70813 I was also with Andy but rather than here in Wiltshire we were in Nottinghamshire, see.....
https://www.ontheupfast.com/p/21936chg/30024737870/x70813-10-21-doncaster-chs-bescot . The Colas locomotive is seen passing South Marston just east of Swindon leading the 6M40 11.42 Westbury Yard to Cliffe Hill (Leicestershire). The photograph is taken from a new footbridge installed as part of the GWML electrification that I have passed many times eyeing it from the nearby A420 but with limited parking, I have never actually been able to stop and visit it.