As part of Amazons Black Friday promo they will be reducing this to $12.99 between 8am-12pm PST(4pm-8pm GMT).
Also being reduced will be Watchmen DC to $9.99 between 12pm-4pm(8pm-12am GMT).
Using XE.com to exchange the prices i get this to be £16.14 delivered for both(using cheapest shipping option) so under the £18 customs threshold.
Both titles are region free so will play on UK Blu Ray players
I did mention this on my Ultimate Matrix post but thought it deserved it's own thread.