 First, on 5 May, the 3rd West Lancashire formed a fourth 4-gun battery, designated D. Then on 15 May the other three batteries were redesignated A, B and C, and the brigade became CCLXXVII (or 277) Brigade, RFA.The brigade ammunition columns were absorbed into the divisional ammunition column on 18 May.Finally, on 23 May, D Bty was swapped with C (H) Bty of CCLXXVIII (H) Brigade (the former 4th West Lancashire (Howitzer) Brigade, though C/CCLXXVIII Bty was originally a Kitchener's Army battery from 18th (Eastern) Division).