In Salalah, circa 1972, a DCI(?) came out authorising the use of black umbrellas in inclement weather. Can't recall the number now but could then and some of us bought them from the local souk in hope of inspiring rain. On repat to Wattisham I was arriving, in Best Blue as per, in pouring rain so I hoisted my brolly and soldiered on. The SWO, a WO Basten (surely a misspelling) went ballistic and demanded to know by whose authority I was carrying an umbrella in uniform. I answered "Sir, by the authority invested in me by DCI xxx." He said he had never heard of such an instruction and I told him that I could not be held responsible for his ignorance. Our relationship went downhill from that point although he did concede, later and with some grace, that I was correct.
I was a JT then and though a techie till demob I ended up as SWO on 2 of my last 3 postings by virtue of being the only WO on the units.