Batsman Ian Bell was ruled out of England's Test series against Pakistan on Tuesday with a broken bone in his foot.
England batsman Eoin Morgan has been ruled out of the rest of the five-match One-day series against India after feeling 'acute pain' in a recurring shoulder injury.
The rule of mandatory helmets for English cricketers comes in the wake of former Australian batsman Phillip Hughes' death, who was struck by a bouncer on the back of the neck during a domestic match in Sydney.
ECB to allow replacements for concussed players in domestic matches