It was always obvious that if the infection got into care homes it would spread like wildfire.
This isn't something unique to this virus. It's very very basic infection control to do everything you can to prevent bugs getting into care homes or any other communal residential setting because it's so incredibly difficult to prevent transmission once they get in.
If the government were 'following the scientific advice' on this then their scientific advisers are spectacularly incompetent - at least I hope that is the explanation because the other things I am thinking are far worse.
And even if the danger of allowing this virus to get into care homes was not bleeding fucking obvious we could just have looked at what was happening in other countries.
7 March major outbreak in a care home in Washington, US.
17 March, news broke of the crisis in Spain's care homes.
Even earlier, we could have got a clue from the widespread infection on the Diamond Princess - another shared residential setting. Or the prisons in Iran.
This is not rocket surgery!
If there aren't enough tests then you isolate patients for 14 days before they go to the care home so you are as sure as you can be that you are not introducing the virus.