From today, key workers can get tested by applying online. This is the same group of key workers that are eligible for childcare. This video explains how it works.
You can book a test here.
It's important to recognise that this is only a test of whether you have it right now, so if you're feeling fine and currently working as normal there is no need to apply. This test will not tell you if you've had coronavirus previously, only if you've got it currently. Your employer will be asked to confirm that you're currently self-isolating.
The aim is to reduce the amount of people in key roles who are having to isolate at home by giving conclusive results, allowing people to either take the right precautions if they have the virus, or return to work if they don't have it.