Like other units, skirmishers may charge an enemy that is visible to at least one of its models when charges are declared. To decide which side of the enemy is charged, follow the normal rules: the skirmishers will charge the enemy in the arc where most of the skirmishers are when the charge is declared. All models within charge reach are moved individually towards their foe and arranged into a fighting line.
When the maximum number of models has been brought into base-to-base contact with the side charged (including models fighting corner-to corner), remaining skirmishers will begin to form up in ranks behind the first line of models in base contact with the enemy.
Any models unable to reach (because they don't have enough movement or because there is no space left in the fighting line) are placed in the rear ranks so that the unit forms up in what looks like a regular formation behind the models that have formed the fighting line.
If the skirmishing unit includes a banner, champion or musician, and any character that has joined the unit, such models are then moved to the fighting rank if there is enough space, swapping places with ordinary models.