I'm not concerned about infection rates in London. We've had these rapid rises for both the Alpha and Delta variants but the hospitalisation rates, while wobbling up and down, stay very constant over time and death rates remain low. That last fact calls into question their contention that prior immunity isn't effective against later variants like Delta.
Here's the hospital admissions chart to yesterday, showing how the Omicron rise is no more rapid that those prior to it and the level well within prior Delta and Autumn bounds. In other words, cool the hysteria, it isn't justified:
And here's the infection chart, showing how the high Omicron infections aren't turning into hospitalisation yet: