43239 brings a welcome return of HSTs to the Swindon area on 11 May 2021, as it works the 1Z25 15:29 Swindon to Bristol Temple Meads CrossCountry service. With the discovery of underframe cracks on GWR's Class 800 fleet, and the consequential grounding of virtually the entire fleet, most trains on the Great Western Mainline were cancelled. However, CrossCountry helped out by providing these Swindon to Bristol shuttles. The welcome interloper is pictured near Chaddington Lane, between Swindon and Wootton Bassett. The Chaddington Lane road bridge can just be seen in the background.