The coordinates can be found at broadfield series... this mean you need to go thought the serie to get all the coordinate/clues you need.
1=G
2=E
3=H
4=C
5=A
6=J
7=F
8=B
9=I
10=D
After getting all of then, go to: N 51° AB.CDE W 000° FG.HIJ
Happy Bonus search!
Xuxas.pt