I may have missed something ( I often do, including check points) but what is this thing about several races listed in the calendar having no safety pins?
Are there certain parts of the country where they are difficult to source? Has the risk assessment deemed them too dangerous (runner stabs himself with safety pin, leaves trail of blood across area of outstanding natural beauty). Is it so as not to cause deviation in compass readings? Or is it something daft like pretending to be environmentally friendly?