The British plan for the battle fought from included more emphasis on the use of heavy and medium artillery to destroy German concrete pill-boxes and machine-gun nests, which were more numerous in the battle zones being attacked, than behind the original July front line and to engage in more counter-battery fire. The British had and medium and guns and howitzers, more than double the quantity of artillery available at the Battle of Pilckem Ridge. Aircraft were to be used for systematic air observation of German troop movements to avoid the failures of previous battles, where too few aircrews had been burdened with too many duties and had flown in bad weather, which multiplied their difficulties.