I'm pretty sure this is in fact a genuine joint "patrol" by the East Belfast UDA and army. If I recall it was taken in 1972 after a big standoff between the UDA and SF in Duke St, just off the Newtonards Rd. It was the only cooperation of its kind, and done purely to placate the UDA who vastly outnumbered the army in the city, but the photograph has been pulled out by republicans countless times over the years as proof of "collusion!" between the SF and loyalists. No mention of the numerous gun battles that occurred between the UDA and army in the early seventies. The Paras shot two UDA men around about this time, ran over a couple of others, and drove a Saracen into a UDA club.Here's a more typical shot of SF and UDA interaction from the same time period, although republicans are for some reason less keen to publicise shots like this: