picked up 10 at £21.20 for myself and used TopCashBack for each purchase too so if they are all paid it knocks another £36.70 off the cost.
Been wondering whether to do it on my father's account too (which he never uses at all) but think I'll stick where I am.
Finding availability is going to be a ..... as so many more people than normal will be looking to redeem before Dec 1st.