Nano magnetic tube, bring your own pen.
I noticed this new bench wandering past featuring some of Morecambe's theatre, film and TV Stars.
Have a look, you'll see them laid out in a "X" formation.
Use the grid below to assign each a number

You'll find the cache at
N 54 0 (Thora Hird) (Jimmy Cooney) (Eric Morecambe + Victoria Wood) (Thora Hird x 2)
W 002 5 (Jimmy Cooney) (Albery Modley) (Victoria Wood) (Victoria Wood)
Checksum = 35
Please replace securely and out of sight.