Another simple multi. And one that could probably be worked out in advance.
However, you need to find a couple of numbers to help you with the coords for e final.
By the coords given you will find some speed limits.
AB = the speed limit
C = the number of signs here
D = the number of letters in the colour of the fence the sign are mounted on
To get the final coords…
N51 (D-A) (A+D) . (B) (D-A) (A+D)
E000 (A) (C) . (B) (A+C) (A)
The complete series including the splitter cache is approx 6 miles or 9.5km and should take a couple of hours, depending on your speed. The route is a mix of fields, footpaths and lanes, which does have some styles and hills to negotiate. Have fun out there!
To split the series into two parts would result in one 4 mile or 6.5km route and one 2.5 mile or 4km route.
Here is a link to all of the caches and types in the series...