Cabbie sorry I can't answer your question about whether the care home staff do it or ourselves - sadly she is a 45 minute train journey from us, so by the time we got to the home, did the test, waited the 30mins for the result it would be her lunchtime! They prefer people not to arrive over lunchtime naturally so even timing it for after lunchtime we decided it's not practical to go at all.
She isn't missing out though as she has a phone in her room so we speak regularly.
Hopefully, one day we will be able to go and see her in person but it's better the home are being over-cautious and my friend is happy which is the main thing.