Here's the tune. I've taken it from the book 'Cockney Ding Dong' by Charles Keeping, published 1975.

Marion


X:1
T:I DO LIKE TO BE BESIDE THE SEASIDE
C:John A. Glover-Kind
I:abc2nwc
M:6/8
L:1/8
K:F
c2^c|:d3=c2A|G2F E2F|c3c3-|c2zc3|d3c2A|
G2F E2F|d6-|d2zd3|e3d2B|A2G ^F2G|d3c3|
B3A2^F|A3G3|A3G^FG|A3G3|E3c3|d3c2A|
G2F E2F|c3c3-|c2zz3|d3c2A|G2F E2F|
d6-|d2z^c d|e2^d e2d|e3=d2=B2|d2c d2c|
d2c B2A|G3d3|z2A G2A|F6-|F2zc2^c:|
F6-|F2