The Hayward Gallery in Southbank center has held my favourite exhibitions in London and each time they are extremely well curated. Definitely a place to visit !
The majority of the shows I tend to go to are in East London so it was refreshing to be invited to a show opening at a gallery in the centre of London and I have to say the caliber of the work is astounding. I don’t think I’ve been to a single on of their shows without being inspired in someway, definitely worth checking out.
SOAS university has a small gallery space dedicated to exhibitions about Asia, Africa and the Middle East. There's a small but beautiful Japanese zen garden on the rooftop (currently closed for refurbishment)