Hi diplodicus
I'm no expert but having looked at a poll book at the SRO today, I can say that the letters down the left hand side stand for:
O = occupier
C = copyholder
F = freeholder
You could also have had L = leaseholder, PC = perpetual curate, PClk = parish clerk, R = rector, V = vicar
The letters along the top are usually abbreviations and/or initials of candidates for whom voting took place.
