I remember 1971 RAF Colerne as a recently ex Brat Jnr Tech. I had a little Honda 90 for whizzing home at weekends. The Tax disc had dropped off and it's not being displayed was spotted by a Plod one morning. I had already applied for a duplicate, and was waiting to receive it. I was charged with riding my motorbike, untaxed. It was remanded from my Flight Commander to the Sqn Ldr. I stated that I had applied for the dupe etc. He very kindly allowed a further week for the certificate to arrive. The following week I was fined £5, the dupe had not arrived. It did the day after my fine though ! I asked, but was told I could not have my money back. And a fiver was a lot of money in those days.