Google Chromecast with Free delivery for £24.99 including free copy of Interstellar. Go to Wuaki here
and buy Chromecast and Interstellar bundle for £24.99 which is cheaper than most places are charging for Chromecast alone especially with P&P. Movie is watchable through Wuaki website and code will be given to get Chromecast through Google Store who will deliver it to you.
Limited to one per customer.
Only available for Black Chromecast.