You should have received a letter from your local authority in late March or early April 2020 suggesting that your business may be eligible to claim for either the small business premises rate relief or retail, hospitality and leisure Covid-19 grants.
If you have not received a letter and you believe you may be eligible, you should contact your local authority. In addition, visit the government website for business help during the coronavirus virus crisis: https://www.gov.uk/coronavirus/business-support
Applying for the grant is straightforward. Log onto the website URL address in your letter, confirm your business rates reference number, eligibility and enter your business bank details. Your will receipt an acknowledgement by email.
In a few days, assuming you meet the criteria, you business account will be credited with the grant you are eligible for.