At my ordinary state grammar school in the 60s we began:
(translating to current school year numbering)
French in y7
German in y8 (top set only at my school, lower sets started Latin)
Latin in y9 (so everyone did French and Latin in y9)
Russian in y10 (optional, for O level)
I did French, German and Russian for O level. I could also have done Latin, but I chose Physics instead.
That was in a grammar school, but I know at least some secondary moderns offered French.
Nowadays Spanish seems to be the most popular option, and I think many students in state comprehensives do only one foreign language. I don’t know what happens in grammar schools as there aren’t any locally.