I'm trying to find a souvenir for my dad and he likes Pink Floyd. Are there any stores in London that have a great collection of Pink Floyd stuff? And not just mugs, more like posters and postcards.
There was a Pink Floyd exhibit at the Victoria and Albert Museum last Fall when I visited. It looks like their shop still has some things related to it altho it might not be what you are looking for. They might have more in person than online - not sure.
https://www.vam.ac.uk/shop/exhibition-ranges/pink-floyd.html
https://www.itsonlyrocknrolllondon.co.uk
Amazing tool, Google.
I'd also wander around Camden Lock Market.
Ditto what Pam said. The V&A museum shop should still have Pink Floyd merch from the exhibition.