Apple 15 - In Memoriam : R.I.P. 🍏 Mystery Cache

This is Bramley Apple series cache 15 by PuzzleClub, a joint account for Hofficoffi, RichieCactus, ===sgb and TheBignells.

The cache is not at the posted co-ordinates, solve the puzzle below to find it.

The Puzzle:

Assume N51 W0

• Caches found on 3rd March
• Cache In Trash Out Events - Mega-Events
• The only digit in First ever Cache GC Code
• Sum of all 4 digits from Multi Cache finds
• Longest Streak + Finds in 2009 - second CM found
• Number of caches found in best month - earthcaches logged