Yes - by law employers are responsible for the health and safety of all employees, including those working from home.

No. There is no requirement to have a trained mental health first aider at this current time. If you do want to have a mental health first aider they will need to go on an appropriate training course.

Wellbeing will generally fall under health and safety as every employer has a responsibility to look after their employees health and safety and this includes their mental health. There are lots of practical things that can be done. From providing information and signposting, to daily check-ins with employees and providing guidance to employee about how to organise and manage their day.

More pro-active support may include survey's and wellbeing coaching from wellbeing experts who are external to the organisation. You can read about all of these in the wellbeing and engagement area.

You shouldn't generally instruct an employee to return home as this would be considered medical suspension for which the employee would receive full pay. A better approach would be to ask the employee a question such as 'you seem unwell, do you think you should be working?' so that they are encouraged to make the decision whether to return home themselves, and then receive pay in accordance with your sick pay policy.