Laurence Llewelyn-Bowen introduces coverage of the Royal Academy of Arts Summer Exhibition. Will Jake and Dinos Chapman's mammoth dinosaur sculptures make it safely through London's urban jungle and into the RA's courtyard? Tracey Emin signs in as the Academy's newest member. Art collector Alvin Hall offers an exclusive glimpse of his own collection and passes on handy tips on buying art. And there's a peek behind the scenes during the hang.