Zavvi is running a DC promotion:
20 percent off selected DC 4K titles, using the code - 20OFF
Including Man of Steel, Wonder Woman and Shazam!
A few more titles added to HMVs 2 for £30 deal including Tenet, Total Recall and V for Vendetta.
However, for Tenet you can get the uncut version from Amazon Italy for £15.51 delivered at the moment
The 4K discs are £31.99, so this makes them £16 each.