Covid-19 Update
Latest Government advice is that unlimited outdoor activity, including water sports, can now take place - although limited to groups of household members and one other person whilst continuing to follow social distancing & hygiene guidelines.
Staying on board overnight, at this stage, is prohibited (unless your primary residence) and so only day sailing is allowed, after first checking with your local marina and port authority.
https://www.gov.uk/government/publications/coronavirus-outbreak-faqs-what-you-can-and-cant-do/coronavirus-outbreak-faqs-what-you-can-and-cant-do#public-spaces--outdoor-activities--exercise