27th May 2021 GBRf Class 66/7 No. 66702 'Blue Lightning' leads classmate No.66774 slowly under Cogload Junction approaching a red signal on Thursday 27th May 2021. The pair were operating 6G75 17:10 Westbury - Crediton with a mixed rake of MHA, MPA, MFA wagons ready for loading overnight with spent ballast. (Photo: Brian Garrett)

27th May 2021 GBRf Class 66/7 No. 66702 'Blue Lightning' leads classmate No.66774 slowly under Cogload Junction approaching a red signal on Thursday 27th May 2021. The pair were operating 6G75 17:10 Westbury - Crediton with a mixed rake of MHA, MPA, MFA wagons ready for loading overnight with spent ballast. (Photo: Brian Garrett)

27th May 2021 GBRf Class 66/7 No. 66702 'Blue Lightning' leads classmate No.66774 south in 'top and tail' formation on the 27th May 2021 while operating 6G75 17:10 Westbury - Crediton engineers for loading with spent ballast. (Photo: Phil Izzard)