Government have released a document which outlines in more detail which businesses can open when, and what rules they must follow.
This includes details such as:
From 29 March, Businesses eligible to host childcare and supervised activities for children will now be able to host all outdoor children’s activities, and outdoor parent-and child groups for up to 15 people (not counting those aged under five).
No earlier than 12 April, Outdoor areas at hospitality venues can reopen, including for takeaway alcohol. These venues may allow customers to use toilets located inside. At any premises serving alcohol, customers will be required to order, be served and eat/drink while seated (“table service”).
No earlier than 17 May, Indoor areas of hospitality venues will reopen. As outdoors, table service will be required.
All of the details can be found here https://www.gov.uk/…/reopening-businesses-and-venues
Please remember that these dates are not confirmed, and will not be until 7 days before.