You asked

Please provide all the evidence you have that masks help reduce the virus.

All the experiments that have been carried out on masks why do we not have a standard mask ?
What tests have been carried out on masks ?

How many tests have been carried out on masks that would prevent Covid 19 ?
What evidence suggests Covid 19 is a virus ?
What information have the government used that provided evidence that lockdowns work ?
What information are the government using to lock us down again & enforce masks ?
What are the long term effects of wearing masks for long periods of time ?

We said

​Unfortunately, we do not hold the information requested. These questions would be better placed with the Department of Health and Social Care (DHSC) and Public Health England (PHE). They can be contacted via the DHSC FOI Contact Form and wn_coronavirus@phe.gov.uk.