On a recent flight from Tampa to Gatwick we were told that there are no spares loaded - much to the frustration of the crew. We had asked if there were spare as ours had “disappeared” from the overhead lockers above our seats (row 4) . The crew were mystified at where they had gone until they saw that the family in the centre of row 4 had no less than 5 sets of bedding across 3 seats. When challenged they said they needed one set to lie on and one set to cover them as the seating was ridiculously uncomfortable. Thankfully there were 2 empty seats in the centre of row 2 and a senior crew member located the bedding for those and gave them to us.
it did seem strange that there were no spares but I guess it all adds to load weights so understandable.