It was a cold when I went out the morning and everything was covered in ice.
I laid the soil warming cable in the heated bench. It holds 14 full seed trays and has a thermostat to control the soil temperature which makes it very useful and more economical.
To keep the heat concentrated in the right place I lined the bottom with insulation then covered it in sand. Once the cable was in place I watered the sand as it was very dry. Finally it was covered with about a half an inch to an inch of sand.
Next job will be to wash and disinfect seed trays and pots!