AKA "Tom and Gronk drink more plonk". (To celebrate).
There is nothing to find at the posted coordinates.
In the recent tradition of "LI", "LII", and "LIII", I bring you "LV". An easier puzzle this time!
If you are wondering why there isn't a "LIV" cache, it is because the New England Patriots weren't in that one. Oh, you say, "But the Patriots weren't in LV either". That is true. But Tom Brady was.
Up until 2020 (when everything went wrong), Tom Brady and the Patriots went together. The Patriots had won 6 Super Bowls. Tom Brady had won 6 Super Bowls. Sure, the Patriots had 40 years of history before Tom, and even played in 2 Super Bowls (and lost). Then for 20 years, it was Tom and the Patriots. But on 20 March 2020, Tom left New England and signed a contract with the Tampa Bay Buccaneers.
I wasn't happy. 
I wanted Tom to stay. And for most of the season, I was rooting against him. 
But when the Patriots completed a poor season and Tom found himself in the Super Bowl again, I had to root for Tom. 
And set this cache.
Not everyone expected Tom to be a success in Tampa. Here is a headline from March 2020:
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But of course, he won. And was named the Most Valuable Player. Tom has now won more Super Bowls than any player or team.
The Puzzle
Assume N 51 and W 002.
N
W
You can validate your puzzle solution with certitude.
The Adder is our only venomous snake, the shy adder can be spotted basking in the sunshine in woodland glades and on heathlands. You are very unlikely to come across one here, and I have never seen one. But it is possible as they can be found across the country, except for the Isles of Scilly, the Channel Islands, Northern Ireland, and the Isle of Man.