Trafalgar Square, London, WC2N 5DN:
see the original Titian "Bacchus and Ariadne",
and a second Boucher that contains the same water-mill
as the Musée de Louvre example that I copied.
e-mail them for information .
Millbank, London SW1P 4RG
see the George Romney original "Jacob Morland of Capplethwaite" 1763,
in the General Collections: www.tate.org.uk/collections/.
affectionately known as "London's best kept secret", this is far and away
the best collection of 19th connoiseurship. An absolutely sublime display of
the finest artworks, including paintings, sculpture, furniture, ceramics, arms
and armour. I cannot recommend this place highly enough. Go.
The makers of the "Brotec Anti-Grafitti Paint" system I had used;
They have gone into liquidation, but their products are available via other companies.