Good Afternoon, I was on a diverted LNER Azuma from Dundee to Edinburgh, and there were a couple of track machines in the sidings south of Stirling Station Also I saw a couple at Retford as seen from 1618 LNER service from Doncaster to London. Any help would be appreciated

RTT suggest 6U11 is working off Stirling South Sidings, which should be DR77905 and likely it's usual companion DR73111. As for Retford, if the Down Sidings it should be MMT 5 (DR97505/605 & 805).

Thank you so much. As I was (unexpectedly) diverted I only glimpsed them when whizzing past.