This is based on data from several sources, including:
* The British Council: They report that French is the most popular foreign language studied in UK schools.
* The UK Government: Their statistics show that French is the most commonly taken GCSE and A-level language.
* The National Centre for Languages: Their research indicates that French is the most popular language for adult learners.
However, it's important to note that Spanish is rapidly gaining popularity, and in some areas, it might even be surpassing French.