They found round 45 individuals dancing and ingesting alcohol in an workplace area.
Police mentioned the £10,000 positive handed out was the second they’ve issued, following a positive for a marriage reception on the finish of October.
Metropolis of London Police tweeted: “Please do not put your self and others prone to catching COVID19: keep on with the foundations and socially distance, even within the festive season.”
The Sq. Mile is house to the capital’s monetary district however police haven’t revealed which firm acquired the positive.
Organisers of gatherings of over 30 individuals could be handed £10,000 fines for breaching coronavirus laws.
It comes as London sees the best Covid-19 an infection price in the entire of England with 191 circumstances per 100,000, based on Public Well being England figures.
Coronavirus charges general in England have plateaued, besides within the capital the place it has risen from 158 per 100,000 the earlier week.