I now realise that the bocage has been made true to form in CM. They must have been quite a high obastacle to traverse. This was the effective tactic that Barkmann employed when he made his famous stand, picking off the enemy armour as they were 'funnelled' down these lanes.
The mortar teams also played a part in unleashing salvo's on the crews and reserves that dismounted when faced with a blocked path due to wrecked armour