Thanks Rotarywise, I lied a bit in that I had read the FCL.010 bit but didn't have the reference with me to refer to - hence what I think was a fairly close interpretation of it in my response. Again, the 4 miles was a bit of a memory thing from the distant past but that was what the CAA required of me when I was applying for my CPL, I've still got the pencil ticks in my log book from when I was counting them up.
Cheers
TeeS