LONDON (REUTERS).- A rare Spitfire warplane and a Francis Bacon still life painting were star attractions at the Masterpiece fair on Thursday, underscoring a strong appetite for unique luxury goods at a time when many Europeans are struggling with austerity. Across town, a Rolex boutique had its official launch do at London’s costliest real estate complex, with a glitzy champagne reception attended by high net worth individuals and celebrities. A private preview at the Masterpiece fair in the expansive grounds of the Royal Hospital Chelsea was packed with uber-wealthy aficionados of fine art, high jewelry, vintage cars and silverware, shopping for items that rarely come to the market. The fair runs to July 5. A unique prototype Spitfire, the warplane that symbolized victory in the Battle of Britain, stood indoors in a huge marquee, with a price tag of 8 million pounds ($13 million). A few meters away, the large