I was once on a tri service course at the Purple School of Learning ( Defence Academy, Shrivenham) where, despite all the friendly banter, the undercurrent was still "we're the Army, and in charge around here, and don't you forget it"
I smiled, not only because, as a Non-Com, my salary was highest on the course and higher than some of the Commissioned Army Directing Staff, but also in memory of an incident in Iraq, where I overheard a Flt Sgt AEOp mate tell a Brigadier that he couldn't have his ISR asset, as it was required for a higher priority tasking, and no, he wasn't going to tell him what it was!
Made oi smile. A lot! That was a few years ago, perhaps perceptions and prejudices have changed and the Services really are Joint. Discuss.