Some years ago just after we were made to wear the hi viz stuff...I was out on the line at an airfield 'somewhere in surrey' (without a hiviz vest on LOL)...I got called to the line hut to talk to ATC on the blower...They asked ''why you not wearing Hiviz ??''...I of course replied ''well you can obviously see me ok ''

(from other side of rwy

)...
Closely followed by another 'chat' with the boss