At Amifontaine, 12 Squadron was briefed for an attack on the bridges near Maastricht with six Battles. After the fate of Belgian Battles attacking the day before, the commander asked for volunteers and every pilot stepped forward; the six crews on standby were chosen. Two Blenheim squadrons were supposed to attack Maastricht at the same time as a diversion and twelve Hurricane squadrons were flying in support but half of these were operating to the north-west and the others were only flying in the vicinity, except for 1 Squadron, which was to sweep ahead to clear away German fighters.