Nearly an hour later the cohort caught up with the Britons. A compact mass of infantry was marching quickly upriver, towards the ford that the cohort had been ordered to defend. From the outset it was clear that they would not reach the ford first, but their leader was a game individual who would at least give it a try and drove his men on as the Romans remorselessly closed in at a tangent. Then the Britons changed their minds and abruptly reversed their direction, heading away from the ford as they made a last desperate bid to escape their pursuers. Maximius gave orders to the decurion in charge of the scouts to skirmish ahead of the enemy column and slow it down.

So the scouts started to dart in, throwing a few of their light javelins at the leading ranks of the Britons, and then galloping back to safety. When this minor distraction failed to have much effect on the enemy’s pace the decurion drew up his men and feigned a few charges, forcing the Britons to halt momentarily to brace themselves for the impact. It did not take long for the enemy to see through the feint and they ignored the third charge, forcing the scouts to quickly break off and scurry away to safety. Even so, some time had been bought for Maximius and his men. A little more than an hour after the cohort had left the fort behind them the Britons turned to face their pursuers.

‘Cohort . . . halt!’ Maximius bellowed. ‘Deploy into line!’

While the five centuries moved quietly into position the Britons formed up into a crude wedge, two hundred paces away, with their backs to the broad sweep of the river. At once they began to beat their weapons against their shields and raised their voices in a cacophony of jeers, contempt and challenges as they worked themselves up into a frenzy. Most of the legionaries had seen this performance many times in the last year and yet the din and the mad capering of their enemies still worked on their nerves as the Romans braced themselves for the ‘Celtic rush’ that seemed to be the tribes’ only tactical manoeuvre.

Cato walked slowly along in front of his men. The Sixth Century was on the left of the Roman line. Some of the younger faces, and a few of the veterans, wore eloquent expressions of doubt and fear, and needed some form of distraction. Cato stopped and turned his back to the enemy.