Full details at for all series at GC6D3PK TT 01
Follow the footpath around and onto the bridge, you can throw sticks in the water see how long the take to get out the other side!
So to get the coords you need some numbers…
From the road signage...
ABC = yards of soft verges
D = cycle route number (opposite side of road, look back too)
N51 (A) (B) . (A) ( (AxAxA)+D) (A+D)
E000 (A+A) ( (AxAxA)+D) . (A+A+D) (C+D) (A+A+A)