Silly mistake
Had put more plants in cold frame to harden off, silly mistake had not found the culprit, thought it was slugs so put slug pellets in cold frame with plants. unable to make lottie for two days work commitments,went over on thursday after work only to notice more damage,this time noticed most of the plant tops where in between the trays.
Salvaged what plants I could and placed two mouse traps in the cold frame amongst the trays, managed to trap one mouse so far,(checked traps yesterday ).