https://www.udiscovermusic.com/competitions/queen-prize-bundle-giveaway/
answer is December 1971
Prize winner will receive:
1x Queen – Queen (Vinyl)
1x Queen – Sheer Heart Attack (Vinyl)
1x Queen – News Of The World (Vinyl)
1x Queen – Jazz (Vinyl)
1x Queen – The Game (Vinyl)
1x Queen – The Works (Vinyl)
1x Queen – Flash Gordon (Vinyl)
1x Queen – Greatest Hits (Double Vinyl)
1x Queen – Greatest Hits II (Double Vinyl)
1x Queen – Names (Yellow T-Shirt)