I caught the Venice: Canaletto & His Rivals exhibition at The National this morning which closes on Sunday as does the Eadweard Muybridge at Tate Britain.
It will be another lifetime before these paintings and photographs will be seen again in the UK so if you are free on Sunday do try and see them.
Whilst at The National there is also the Bridget Riley and, as interesting, the Ben Johnson Liverpool, Zurich and London landscapes which are quite sensational.