Greenhouse insulation

I agree with you both I’ve been closing up the poly tunnel very evening and putting fleece over my young and susceptible plants. Last night I covered all my toms, gherkins peppers and chillies that were close to the side walls, I didn’t cover the toms in the centre raised beds as I thought they were positioned ok, however some of the top leaves have a bit of curl in them but the bottom ones look ok. I gave them a seaweed misting feed and a liquid feed. Hopefully they will recover. I will cover them tonight