We are taking a lot of enquiries about whether or not to send children in to school with various symptoms. Hopefully, families will find the guidance here, from the NHS, helpful. Note that it is fine, encouraged even, to send children in with coughs and colds – we all have to learn to manage with those. The key thing in that respect is the presence of a temperature.
https://www.nhs.uk/live-well/is-my-child-too-ill-for-school/