Update 16 June 2021

The government has updated the Guidance for Weddings & Civil Partnerships in England following the Prime Minister's announcement. It states:

From 21 June, there will no longer be a maximum number cap for attendees set out in law. Instead, the number of attendees at weddings, civil partnerships and receptions will be determined by how many people the venue or space can safely accommodate with social distancing measures in place. This will be based on the COVID-19 risk assessment of the venue or outdoor space, and the measures put in place to limit the spread of COVID-19.  

For further information, please refer to the government Guidance for Weddings & Civil Partnerships. Please note that this is only for England.