Of course, other frescos in the Palace have been restored, but they were not done using the water-glass technique—that appears to be the difficulty. Other frescos elsewhere have been cleaned, dirt and dust have been removed and they have been greatly improved. I point out to noble Lords that Maclise painted a quarter-sized version of the Trafalgar mural on canvas in rich colours. It is in the Walker gallery in Liverpool and is available to look at on the internet, which I did before I came to answer this Question. It gives some idea of how magnificent the colours must have looked when they first went up, but unfortunately they have not survived 150 years.
My Lords, although the technique used in the Royal Gallery is different from the technique used by Michelangelo in painting the Sistine Chapel ceiling, would it be worth consulting the Vatican Restoration Laboratory, which established new rules in 1978 for restoration, before we abandon any idea of restoring our own wonderful murals?
My Lords, we have not abandoned the idea. Over the years, the Curator and the Works of Art Committee have looked many times at ways in which we might be able to do this, but so far no method has been found. Tests have been done on the murals which have not really had any satisfactory results. Lighting has been considered and perhaps could be improved. New lighting techniques will be adopted for the Armada paintings which might help, but even good lighting will not restore the colours to the murals as they are.