Uses of high school Computer Science: where can it lead other than university CS?
The Russell Group of Universities has published a useful list of recommended A level subjects for different degree options which suggests that other than a CS degree, CS A level is recommended for:


Aeronautical Engineering
Biochemistry
Biology
Chemical Engineering
Chemistry
Civil Engineering
Economics
Electrical / Electronic Engineering
Engineering (General)
Geology
Materials Science
Maths
Mechanical Engineering
Medicine
Optometry
Orthoptics
Physics
Psychology
Sociology


Problem solving and computational thinking is a hugely transferable skill in itself.  Almost any science / engineering route through academia into the workplace is greatly benefited by the ability to write / modify some code that will process data efficiently and generate exactly the sort of analysis / evidence that you require.

For example, a substantive part of a Psychology degree involves collecting and processing statistical data. Even without the logical and analytical benefits of CS, the ability to write code to automate the analysis of that data immediately gives you huge advantage over peers without any CS skills.