Here is the scenario, the French have been attacking with artillery support, but things have gone wrong. The French infantry is on the run. The French artillery is exposed. It had the earlier innitiative and fired at British infantry ahead of it in the first segment of the phase. The British choose to advance toward the French guns. It is the second segment of the action phase and it is quite obvious the British are going to launch a melee assault on the French guns. Because they have a standing attack order do they need to stand and fight even under impossible odds and probably get wiped out because they can't retreat unlimbered or can they take the practical route and limber up the guns before the melee begins so that if they lose they can run away and attack again later.
It seems to me that it is most likey they must stay limbered, but what does everyone else think?