Based on website I use, the following sightings are recorded:
Southall July 2024 to present (last sighting 13/10/24)
Nemesis (Burton) July 2023 to March 2024 (possibly to May 2024)
16/1/23 various (could be working or possibly towed)
Southall August 2022 to Dec 2022
Mid Hants mid July to end July 2022
Southall June 2019 to mid July 2022
Other notable dates:
June 2019 Ramsgate open day
July 2017 Slade Green open day
Sep 2016 East Kent Railway
Sep 2014 East Kent Railway
July 2013 East Kent Railway
June 2012 York NRM
May 2011 East Kent Railway
That's not to say it may not have been elsewhere, but that hopefully gives you a flavour.