There’s a real problem with the big exhibitions that a lot of people pay to see the items and I’m afraid people standing in front of them for ages to make sketches make it harder for other visitors to see the exhibits.
Perhaps the way out of this is for museums to offer art students special extended hours so they can visit without the rest of us getting in the way?
And yes artists, twenty of you sprawling around the Hellenistic sculpture gallery at the British Museum are in the way - so please stop tutting when people stand in front of the artworks.