The trophies for Sir Sam Mendes's movie included best film, best British film, best director and best cinematography.
Joker won three awards including best actor for Joaquin Phoenix, while Renee Zellweger was named best actress for her portrayal of Judy Garland.
South Korean film Parasite won two prizes - for original screenplay and film not in the English language.
There were no major upsets or surprise winners, with 1917 unarguably dominating the evening.