The link below tells you what you must do before you travel to England and after you arrive.
What you must do depends on whether you qualify as fully vaccinated under the rules for travel to England.
If you need to get a fit-to-fly COVID-19 test before returning home after REFSQ, you can use this link to find a testing service in Birmingham:
One of the test providers is Boots (the UK’s largest pharmacy chain). Boots has branches within 10 minutes of Aston’s campus. You should be able to book a test here: https://www.boots.com/services/covid-19-testing
When looking for a testing service, be careful to check the prices, as what the different service providers charge may vary.