I hope i have these details correct as fed back by parents.
Regardless of whatever changes you hear about my 10yr old daughter fell foul of airport security at Gatwick last week after my mum tried to take her large bottle of piriton on the plane as she has a nut allergy. No problems with other meds but as piriton was overlooked and not on medical letter no way was it going to be allowed to travel total jobsworth at security but hey can understand why!
Bottle was bigger than 100mls(?) Fortunately mum was able to buy a smaller bottle once past security but a warning to all those flying check your bottle sizes and more importantly make sure your dr's letter states all medication that needs to travel in hand baggage with you!