Final answer:
Britons employed different tactics while retreating, which could have included forming defensive lines, engaging in guerrilla warfare, pillaging, or burning their encampments. Specific historical contexts, like the Boer War, show the British using scorched-earth tactics.
Step-by-step explanation:
While retreating, Britons would typically employ various tactics depending on the historical context and period. However, in the context of Roman Britain, the Britons did not have a standardized method of retreat that applied to all situations. Rather, historical accounts suggest that at different times, Britons might have formed defensive lines, engaged in guerrilla warfare, pillaged, or even burned their encampments as strategic moves during withdrawal. For example, during the Boer War, the British adopted a scorched-earth policy, destroying Boer homes and farms. In other instances, such as during the retreats of the Mongol armies, feigned retreats were used to ambush pursuers.
As per the reference material provided, upon suspicion of harboring pro-rebel sympathies, British commanders ordered entire villages to be burned, indicating that the British army at times would destroy their own or enemy assets to prevent them from falling into the enemy's hands.