Thank you once again....with a little more searching I did find this which is probably the one, everrything seems to match:
Evans, James m Bowler, Eliza Hannah, 1916 Primitive Methodist Church, Warrington Road, Ashton in Makerfield, Wigan and Leigh registers A21W/1/2 on Lancashire BMD website. This matches the year I had originally, although thought it might be incorrect given they were both very strong Methodists, yet my Dad was born March 12th, 1917 - means GM was 3 months pregnant when they got married
James was his only name, no middle name/initial.
Typo no problem, I had 1916 in my notes, just wasn't surprised to read 1915 given their religious background.
Thank you again