For anyone in London currently willing to leave their house (!) a trip to Somerset House is recommended because their currently 'Beano' exhibition has SO MUCH original comic art in it. Here are just some of the Jonah & Roger the Dodger pages on display
https://boysadventurecomics.blogspot.com/2022/01/beano-somerset-house-ken-reid.html (https://boysadventurecomics.blogspot.com/2022/01/beano-somerset-house-ken-reid.html)