Using the values obtained during the short series locate the bonus cache at N 53° 38.xxx' W 1° 41.yyy'
You are looking for a small tube
Thanks for taking part and I hope you enjoyed the great views along the route and sorry about all the mud !
Update : Spring 2021. After replacing the logs around the series I forgot to add the bonus numbers so here they are
1=0 2=5 3=7 5=6 7=3 10=3