As of the 19th of July, legal restrictions have been lifted and any business can open as they are no longer being told to work from home. Gov.uk report that:

“From Step 4, social distancing guidance will no longer apply. This means that you do not need to implement social distancing in your business, workplace or venue, and customers and workers do not need to keep apart from people they don’t live with.

The government is no longer instructing people to work from home if they can, so employers can start to plan a return to workplaces. During this period of high prevalence, the government expects and recommends a gradual return over the summer. You should discuss the timing and phasing of a return with your workers.”