The cache is NOT at the given location.
You will need to solve the puzzle to find the container.
This cache forms one of the Ruddington Puzzle Cross as listed below, designed by Dr RuddRobins, tested & difficulty rated by Mrs. RuddRobins and swagged up + placed mainly by the young RuddRobins.
Log sheet only here, please bring pen and maybe tweezers.
NOT the puzzle:
"Pooh, promise you won't forget about me, ever. Not even when I'm a hundred."
Pooh thought for a little. "How old shall I be then?"
"Ninety-nine."
"Pooh nodded. "I promise," he said.
Still with his eyes on the world Christopher Robin put out a hand and felt for Pooh's paw. "Pooh," said Christopher Robin earnestly, "if I - if I'm not quite --" he stopped and tried again - "Pooh, whatever happens, you will understand, won't you?"
"Understand what?"
"Oh, nothing." He laughed and jumped to his feet. "Come on!"
"Where?" said Pooh.
"Anywhere," said Christopher Robin.
* * *
So they went off together. But wherever they go, and whatever happens to them on the way, in that enchanted place on the top of the Forest, a little boy and his Bear will always be playing.
The only real link from this to the cache is Poohsticks . . . . 
The puzzle:
Assume N 52 5x.xxx W 001 0x.xxx.
The caches in the series are:
• Find X: Here it is! (Ruddy Depot) (GC7WT5Y) – BONUS
• Ruddy Railway (GC7WTZ4) + CLUE TO BONUS
• Space Family RuddRobins (GC7WTZ9)
• Ruddy Arborescent (GC7WTZE)
• Roam Around Rudd (GC7WV04) + CLUE TO BONUS
• Der Schweizerische RuddRobins (GC7WV0J) + CLUE TO BONUS
• Quicker than you can say Jack RuddRobinson (GC7WV16)
• RuddRobin Redbreast (GC7WV1R)
• Oh No, Ruddy Maths . . . ((GC7WV28) + CLUE TO BONUS
• RuddRobin Hood (GC7WVW4) + CLUE TO BONUS
• Dread Pirate RuddRobins (GC7WVZ7)
• Ruddy Luddites (GC7WW39) + CLUE TO BONUS
• RuddRobin the Boy Wonder (GC7WWC1) + CLUE TO BONUS
• RuddRobin the Hooded Man (GC7WWE2) + CLUE TO BONUS
• The Treasure of RuddRobins Rock (GC7WWE9) + CLUE TO BONUS
• The RuddRobinson Project (ion) (GC7WWED) + CLUE TO BONUS
• Christopher RuddRobinson (GC7WWEX)
• Here's to you Mrs. RuddRobinson ((GC7WWFD)
• Who's Screws (GC7WYWR)
• Ruddy Hell (GC7WZ13)
10 of the caches as marked contain a clue to find the final Bonus Cache.