Here's the extract from the government's advice issued today for educational settings:
Clinically extremely vulnerable individuals are advised not to work outside the home. We are strongly advising people, including education staff, who are clinically extremely vulnerable (those with serious underlying health conditions which put them at very high risk of severe illness from coronavirus and have been advised by their clinician or through a letter) to rigorously follow shielding measures in order to keep themselves safe. Staff in this position are advised not to attend work. Read COVID-19: guidance on shielding and protecting people defined on medical grounds as extremely vulnerable for more advice.
Clinically vulnerable individuals who are at higher risk of severe illness (for example, people with some pre-existing conditions as set out in the Staying at home and away from others (social distancing) guidance have been advised to take extra care in observing social distancing and should work from home where possible. Education and childcare settings should endeavour to support this, for example by asking staff to support remote education, carry out lesson planning or other roles which can be done from home. If clinically vulnerable (but not clinically extremely vulnerable) individuals cannot work from home, they should be offered the safest available on-site roles, staying 2 metres away from others wherever possible, although the individual may choose to take on a role that does not allow for this distance if they prefer to do so. If they have to spend time within 2 metres of other people, settings must carefully assess and discuss with them whether this involves an acceptable level of risk.
Living with a shielded or clinically vulnerable person
If a child, young person or a member of staff lives with someone who is clinically vulnerable (but not clinically extremely vulnerable), including those who are pregnant, they can attend their education or childcare setting.
If a child, young person or staff member lives in a household with someone who is extremely clinically vulnerable, as set out in the COVID-19: guidance on shielding and protecting people defined on medical grounds as extremely vulnerable guidance, it is advised they only attend an education or childcare setting if stringent social distancing can be adhered to and, in the case of children, they are able to understand and follow those instructions. This may not be possible for very young children and older children without the capacity to adhere to the instructions on social distancing. If stringent social distancing cannot be adhered to, we do not expect those individuals to attend. They should be supported to learn or work at home.