Have no long idea how long this will be up for but just had this post pop up on my facebook newsfeed.
"We’re sorry you may have missed your favourite bread over the past couple of weeks and had to settle for something else! Our supply issues have been sorted and your favourite bread is back on shelves. Tell us why you love our bread and we’ll send you a voucher for a FREE loaf of Ploughmans 😊 T&C’s apply."
They posted that at around lunchtime, so not sure if still active as only just seen it, or for how long,
So maybe give it a go sooner than later. :)