There is updated Government guidance for people who are clinically vulnerable (4 November 2020). You can find it here 

https://www.gov.uk/guidance/new-national-restrictions-from-5-november

Information on who is in the clinically vulnerable (moderate risk) groups is here. This is different to the clinically extremely vulnerable (high risk) groups. 

Clinically vulnerable people are those who are:

• aged 70 or over (regardless of medical conditions)

• under 70 with an underlying health condition listed below (that is, anyone instructed to get a flu jab each year on medical grounds):

  • chronic (long-term) mild to moderate respiratory diseases, such as asthma, chronic obstructive pulmonary disease (COPD), emphysema or bronchitis
  • chronic heart disease, such as heart failure
  • chronic kidney disease
  • chronic liver disease, such as hepatitis
  • chronic neurological conditions, such as Parkinson’s disease, motor neurone disease, multiple sclerosis (MS) or cerebral palsy
  • diabetes
  • a weakened immune system as the result of certain conditions or medicines they are taking (such as steroid tablets)
  • being seriously overweight (a body mass index (BMI) of 40 or above)
• pregnant