They're in the freezer. Seems to be a national deal as others in the comments have bought at 99p. It was £2.99 each or 2 for £4 before Christmas but saw new labels today for 99p! Old label is still up alongside new labels but bought both types of pizza and both scanned at 99p. Bought at Lidl Plainmoor store in Torquay today about 1pm, there were plenty left.
Someone reviewed one of these on Youtube about a month ago. I saw the video when I was searching for an product image. I'll post the vid but really its just an old man eating a pizza and saying its nice lol!