One end of the British line was defended by a unit of Line Infantry (Average, Drilled, with skirmisher attachment) in extended line and a unit of Light Dragoons (Average, Drilled).
The French are trying to flank them. They declare an assault on the Light Dragoons with a unit of Hussars (Superior, Drilled, with attached officer).
They also assault the British infantry with a unit of Light Infantry (Av, DR) in tactical formation.
The British commander chooses to stand and fight as he is in both situations.
The Light Dragoons counter-charge and meet the Hussars. The British Line infantry passes 2 hits in defensive fire. The French Light Infantry drops one cohesion level to "disordered" but they pass their CT so they move into contact with the British line infantry.
In the Combat phase:
The active player (French) chooses to start the combat adjudication with the cavalry vs cavalry.

The French reroll 1s and 2s (superior+officer). They inflict 6 hits (all dice).
The British inflict only 1 hit out of 4. They become broken and they retire 7 MU.
The French pursuit by 4 MU. They contact the British infantry that is already in contact with the French Infantry. The distance is more than half the pursuit move so the rules say that the combat will take place in the next turn.
However the reaction has to be resolved this turn. This is where it starts getting complicated. We assumed that the infantry half-line would have a chance to defensive-fire. Unfortunately the British a) lost a CT to stand and fight and dropped one cohesion level and b) did not pass any hits on the hussars so the later moved into contact with the infantry.

Next we move on to the combat of infantry vs. infantry. It was not clear to us if the combat should include the hussars simultaneously or not. We assumed that the Hussars should resolve their combat against the infantry next turn.
So the combat was adjudicated taking into account only infantry vs. infantry.
The British passed 2 hits vs 4 hits from the French.
The British dropped another 2 levels and Broke.

The British, being in contact with cavalry at the moment they broke, were destroyed.
I am not sure if this sequence was correct, please comment if you see anything wrong!