"We're a long time into this virus and a long time into the testing for us finally to be getting the figures".
Some schools had already closed prior to the local lockdown.
The BMA also called for clarity about how regional spikes will be managed in the future. "This is all the more important given that the "world-leading" test and trace app is not in place, meaning local leaders and teams armed with up-to-date information will be vital in containing spread of outbreaks". People have cars. In fact, it might actually backfire, with people from the most virus-hit city dispersing to their local towns so they can have a pint or go shopping, thus spreading the virus into places that were less badly affected.
Ahead of further lockdown restrictions being eased at the weekend, the BMA made a series of demands from the government.
The BMA said this metric should consider not only the regional reproductive number or R rate - the number of people that one infected person, on average, will pass the virus on to - but also the proportion of the population now infected.
He told the BBC such outbreaks were "inevitable" and testing and contact tracing should be led by local experts.
Non-essential shops will close, schools will shut to most pupils and people are being advised to stay at home wherever possible.
The measures will last until at least 18 July and apply to the city centre and a number of suburbs.
Previously, Mayor of Leicester Sir Peter Soulsby said policing the lockdown would be "something of a challenge" without knowing what the boundaries were.
A spike in infections in Leicester means the city has three times more cases than the city with the next highest total.
"Given the Government's advice overnight and how it was clarified this morning, I was frankly astounded that the BHA considered it appropriate to race at Leicester", said McPherson, who was due to run Homing Star.
The Department of Health said as of 17:00 on Monday, 43,730 people had died with coronavirus in the United Kingdom, an increase of 155 on the previous day.