Just remembered at 9:30pm last night that we were predicted to have a hard frost overnight so I zoomed out into the night with a torch to rearrange some of the tender plants. Most of the delicate-ish stuff i slid under the car covers in a sheltered corner if the barn, but I had to knock up some impromtu heaters for the greenhouse to make sure the tomatoes survived.
I dotted three bottles of hot water in between the plants and then lay a sheet of bubblewrap over the top. It was lovely and warm this morning when I went open up the chickens so I'm quite pleased that worked.
I do have a parasene heater for a greenhouse somewhere in the toolbarn specifically for such emergencies but the state of barn at the moment meant I hadn't got a hope of finding it. Typical!