It's been back again. Mary's tip about mint essential oil worked well and almost solved the problem. However, I neglected to refresh the make-up pads with more oil and another mouse has had a go, ruining the bag containing the cooking kit in its search- fruitless as I'd removed all the edibles except for some overlooked rooibos tea bags. So, my fault and a lesson for me : must regularly refresh.
The mouse must have a charmed life as it avoided the mouse trap with a tempting peanut for bait. Perhaps I need to replace that too