Ann: New GBP2m NIHR-Funded UK Paediatric Asthma Clinical Trial, page-28

Agree ultimately it will be the study results that will put all this to bed.
However in the world of Clinical Research where funding is scarce and reputations mean everything - you never ask a question you don't already know (or have a pretty good idea) what the answer is going to be ! Failed studies is the quickest way to never getting funding in the future and research irrelevance. So Dr. Wolfe and Prof. Grigg are very confident that their protocol with the new technologies will be significantly superior to today's practice. They had the chance to load up and stack the study in their favour with whatever devices, interventions that gave them the best chance of success and they chose Wheezo - pretty significant when your reputation is on the line.
Again as I said this is not a study that is just looking at whether Wheezo works or not, Wheezo is part of a multi-factorial tool kit to manage paediatric asthma and they are trying to create synergies (1+1 =3) type results when you follow the recommended protocol.
The fact it is a clinical trial where patients are monitored and followed up more closely compared to the real world will also ensure that the protocol is followed correctly giving the study an even greater chance for success.
Shame we can't fast forward a couple of years and have this invaluable data now !