Nick, Marienne's records only cover graves in Ford and Yew Tree, though she may be able to help with your Charltons, I can't see the Copleys in the Ford and Yew Tree burials online.
Hopefully this will save Marienne some time:
Arthur Alfred Copley of 702 Longmore Lane has a probate calendar entry which says he died 20th Jan 1967 and Admin of his estate was granted to Catherine Copley, widow.
There is a corresponding burial at Anfield on 25th Jan 1967 for Arthur Copley aged 56, of 702 Longmore Lane RC section 3, grave 765 which looks likely to be the man you are looking for.
I can't see a burial/cremation record anywhere online for Catherine Copley died 1977, but her wishes 'may' have been to be cremated and by then Springfield Crematorium was also in operation (for which there are no registers online that I am aware of) so its 'possible' that she may have been cremated there.
Boo