You're not wrong there, matey. On Remembrance Sunday this year, the Borough Commander turned up with 10 of his minions (for crowd and traffic control), laid the wreath and then saluted with his left hand. He thought we'd missed it but one of his minions told him of the faux pas and how it had been pointed out to them by the bunch of old gits wearing medals.
**** know what plods saluting manual says now, but the British Army used to salute with either hand, I think it was whatever hand was closest to what you were saluting and/or there was a reason you couldn't salute with your right.
Even today, the British Army is so desperate for pretend respect that you could have injured your right arm and be unable to salute with it, you would be expected to salute with your left.