The frost got mine too.
Kicking myself. My earlies were too high to cover, and I didn't have any fleece to hand anyway. So I was expecting a bit of damage here. Not too bad - some untouched, a few damaged, some totally black.
But in the few days between my last trip to the plot and the frost the second earlies had emerged. I could have earthed these up and avoided damage, but they were hit hard. Ho hum. Mea culpa.
Like many others I'm hoping this will delay growth rather than ruin it altogether.