I found this link online and thought that this would also be interesting to discuss on here cambridgeassessment.org.uk/our-research/data-bytes/do-grades-in-one-gcse-subject-predict-results-in-another/.
This data relates to pupils who took GCSE exams in 2016. My dds best results were Biology, Chemistry, English Lit, RS and French so guess that fits in with the data. Interesting how Biology fits in as a bridge between Science and Humanities subjects. What do the rest of you think?