No idea how true it is.
Dull fact No.1 - SO was the call sign for Sun Hill police station in the TV series The Bill.
I looked closely to see if any of them had SO171 (Reg Hollis) or SO595 (Tony Stamp) but if they had I missed it.
Dull fact No. 2 - Every officer in The Bill who had call sign SO416 was killed.
Male. Over 60. Curmudgeonly misanthrope.
Pedal cladding specifications - strictly need to know.