Tim, tracked down a copy of the Enoch Kent single of "The Smashing of the Van". It is on Beltona label 45-BL 2728 dated 1960. As suspected it is the same version as is on the Ace of Clubs album, electric guitar, drums and backing vocals. It is indeed the Manchester version.
Songs from Ireland's History edited by Andrew Moyes from the Glasgow Folk Centre in the 60's features the Manchester "Smashing" and their prayer - "God save Ireland", but no mention of the Glasgow song.
Patrick Glavin's "Irish songs of Resistance" again only deals with the Manchester songs. Still looking,
love, john.