Yes I think it will just cause more to avoid testing and T&T
and at the same time school has said to send the DC in unless very specific list of symptoms which may miss cases as well-
Quote
Parents / carers should look carefully at key symptoms (to check not colds/flu) keeping your child off school without these key symptoms could result in them falling behind further at school which we are anxious to avoid.
In bold If you would have sent your child in to school before lockdown with the symptoms they are experiencing, then the general advice from Government is that you send them in now
To be clear, the key symptoms are:
A high temperature you feel hot to the chest or back (you do not need to measure this)
A new continuous cough (this means coughing a lot for over an hour, or 3 or more coughing episodes in 24 hrs)
Loss or change to sense of smell or taste