That date killed corresponds to Operation Epsom. Tough battle for all those involved. I suggest you get copies of the War Diary for that period and his Service Records (the latter cost £30 from the MOD unless you are Next of Kin in which case they are gratis). Note: the War Diary will contain details of the Regimental actions on a day by day basis but are unlikely to contain any direct details of Pvt Gilding. Good luck with your research.