Late Frost Casualties

I had to go away for two weeks to work, and before I left it looked like spring had arrived; everything in the garden was doing nicely. I'd had a few plants in a makeshift greenhouse over winter (not anticipating how mild winter would be), which I'd taken out of the greenhouse, but left strict instructions with my other half for their care in my absence.

However, it appears I wasn't specific enough. I did stress that I was most concerned about two acers, which had received a head start in the greenhouse after struggling last year. They have been well cared for (thank goodness) and put back in the greenhouse overnight, so they are fine. However, it appears that they are the ONLY plants that have received any attention. While I was away, temperatures dropped, and everything was left to fend for itself.

Casualties include my kiwi, which before I left was doing really well, with new leaves. It's now a black stick. (Not sure that will recover at all).

I have a very young cercis siliquastrum (Judas Tree), which had been in the greenhouse purely because it's so young. That had new buds about to burst into leaf before I went - the tiny leaves are now blackened (I hope it recovers later).

Fortunately, everything else seems to be unscathed. I might have put my dwarf peach back inside, but that looks like it will be OK.

Is there any way I can tell if the kiwi has been killed? I don't have high hopes for it this year, but might it come back at all? I'm crossing my fingers for the Judas Tree, and just hoping it tries again later. Grrr... Hindsight is a wonderful thing.