Yes, it's happened before. It's happened to most major hospitals at some point over the winter months over the years.
What is different here, is that covid cases are rising. They're not just rising, they're rising quickly, and it's continuing to rise, as are hospital admissions.
Also this is one hospital. With cases rising the way they are all over the country, we may find hospital after hospital calling the same.
When before we've had it, it's often been individual hospitals with a localised increase, which isn't expected to spill into other areas, so diversion is a possibility.
It's one thing to think "oh well" when it's one hospital which is nowhere near you.
It'll be a different matter when you need to call 999 and you know that all the local hospitals are in that situation.
Have you ever called 999 and got the message "please call back because our lines are all busy"? I have. It's terrifying when you have someone who is losing consciousness with probably a stroke. You feel totally powerless to help.
Then when we eventually got through (3rd call) we were told we were on urgent response and the approximate wait time was 2.5 hours, because the ambulances were all out.
Hopefully tier 4 was called in time to bring down the cases, or at least stabilise them, but we don't know yet. Cases are rising, 41k today, likely to stay at that level or increase for the next few days as the Christmas backlog comes in.
This is what lockdown prevented in the first wave.
Stay safe, folk, wherever you are.