The 68th BFI London Film Festival came to a close last night, with the UK premiere of Piece by Piece, the LEGO biographical documentary / comedy directed by Morgan Neville, which follows the life and career of musician Pharrell Williams. The closing night gala at the Royal Festival Hall was disrupted by a group of animal rights protesters representing activist group PETA. They unfurled a banner that read: “Pharrell: Stop Supporting Killing Animals For Fashion” – referring to the musician and director’s role as the men’s creative director of Louis Vuitton. “Shame on you, Pharrell. Animals are s…