Ronald Searle was not just an illustrator and cartoonist, his work also appeared in other media. Here are a few samples of his movie titles work. Of the six movies he is credited with, I only have half available to show. Going from most recent, here they are:
THOSE DARING YOUNG MEN IN THEIR JAUNTY JALOPIES (1969)
Of the four St. Trinian's movies of the 1950s and 60s. the films THE GREAT ST. TRINIAN'S TRAIN ROBBERY (1966), THE PURE HELL OF ST. TRINIAN'S (1960) and THE BELLES OF ST. TRINIAN'S (1954) do note have their Searle-title sequences available online to look at.
But BLUE MURDER AT ST. TRINIAN'S (1957) does have its titles online (but it's not available for embedding). Go to the link to see it.