The National Gallery is just across Trafalgar Square and so was an obligatory port of call this morning. Once again, though, we decided on a targeted approach; we would, we declared, visit just one picture per period. This was a tough call. We ended up with Uccello (St George), van Eyck (the Arnolfini portrait), Holbein (The Ambassadors), Michelangelo (The Entombment), Velazquez (The Rokeby Venus), Stubbs (Whistlejacket – obligatory after War Horse the previous evening), Turner (The Fighting Temeraire), Seurat (The Bathers) and Van Gogh (Sunflowers). What a collection!