Go on here, and apply for one
https://www.gov.uk/coronavirus
they have home tests showing as available if you need one
How do you want to take the coronavirus test?
By requesting a home test kit AVAILABLE
You can ask for a kit for yourself and anyone else you live with who has coronavirus symptoms. There is an identity check for home test kits.
By visiting a regional test site in England AVAILABLE
You or someone you live with must have a car to get to a local test site
By visiting a regional test site in Wales NONE AVAILABLE
You or someone you live with must have a car to get to a local test site
By visiting a regional test site in Scotland AVAILABLE
You or someone you live with must have a car to get to a local test site
By visiting a regional test site in Northern Ireland AVAILABLE
You or someone you live with must have a car to get to a local test site