We have not yet reached 50% of daily rate for testing
Dr Jenny Harries Deputy Chief Medical Officer Public Health England
from Coronavirus Committee . talking about role of PHE and their resources ,eg laboratories.
Earlier she referred to 2,000 tests per day being the max that could be done ,going up to ( from memory from 13 March to c3,500 ) .
So I'm guessing there is a greater facility to test than there are tests available . Is that other people's understanding ?