The arts review page is going to be a tiled page. Each tile will link to a review, and there will be images if applicable. We’re quite happy for the quality of the images in each tile to simply be smartphone snapshots if that is all that is available. There is no point in a review not being published, because someone was not there to take a quality photo.
It may however be preferable for the arts page to show posters, rather than photos. This is due to the nature of the subject matter, which is different to live music.