I can now complete my grandfathers story with this final posting about his theatre of war.
This is thanks to a 1994 first edition of Michael Stedmans book the Manchester Pals.
In this he states that both the 20th & 22nd Bn's were in action at the Third Battle of Ypes, Gheluvelt, October 1917 & then they both spent the bulk of 1918 in Italy. It was a quiet time until the 20th Bn. returned to France to persue the retreating German Army in October/November 1918 & the 22n Bn. were involved in the crossing of the River Paive in October 1918. My grandfather started his service in the 20th Bn. but finished it in the 22nd Bn.
Both Bn's were in action at the 1916 Battles of the Somme, the 1917 Battles at the Hindenburg lines, the 1917 Third Battle of Ypes & in the 1918 Italian Campaign. In this period the 20th Bn. suffered 644 fatalities & the 22nd Bn. 623 fatalities.
THANKS AGAIN TO EVERYONE WHO HAS HELPED ME WITH MY JOURNEY OF DISCOVERY