A U.K. businessman has launched a legal bid to challenge the lawfulness of the U.K. government's ongoing COVID-19 lockdown.

Simon Dolan, who runs a contractor payroll and accountancy business, is seeking a judicial review over the U.K. government's lockdown measures which have required non-essential businesses to work remotely or close, and restricted personal gatherings among other measures. The measures were brought in on March 23.

As part of Dolan's legal process, his representative lawyers at U.K. firm Wedlake Bell have delivered a letter before action  to the government, giving it until Thursday to respond.

Dolan claims that the government unlawfully implemented regulations under the Public Health Act 1984, instead of the Civil Contingencies Act 2004 or the Coronavirus Act 2020.

He also challenges the legality of the continuation of lockdown regulation, and whether the tests fail to take account of the economic and social impacts of lockdown as well as whether it contravenes the European Convention of Human Rights.

Dolan claims that the government should be looking to reopen schools, allowing gatherings of up to 100 people and reviewing the lockdown strategy more frequently.