Large Fridge freezer (St Albans AL4)

Chrome AEG fridge freezer in good condition, with small dent of freezer door. All shelves etc in good condition with no cracks.
About 2 m tall x 60 cm wide x 60 cm (plus handle) deep.
We used this as an overflow fridge freezer for Christmas and all worked well, but when I was clearing out the remaining items from the freezer I noticed that the bread was not hard (but the milk was solid). I may have inadvertently taken out the plug for a while to use my power tools - I can't remember. The next day I put milk bottles full of water in each of the drawers and they were all frozen solid 24 hours later. So there may or may not be an intermittent fault with the freezer (or my memory!) - it would be best to test the freezer before filling it up with expensive food.
Please indicate that you have read this and understand on your response. It would be helpful to say when you could collect too.