A copy of his parents marriage certificate will give their ages and fathers' names to help you track further back.
the only Thomas BATTLE I can see who married a Caroline was at Oldham in 1923, her name Caroline McGRATH.
At Oldham in 1917, a Caroline SMITH married a Thomas McGRATH so maybe Caroline was a widow when she married Thomas BATTLE.
copy certificates can be ordered from http://www.gro.gov.uk/gro/content/certificates/default.asp
references required ...1917 Dec quarter at Oldham volume 8d page 1055
1923 Dec quarter volume 8d page 1046