The universities that accept WAEC and NECO results will also accept a ‘C’ credit in English.
If you are using an older WAEC qualification, reach out to the university whether they will accept it.
Also, you can apply to ECTTIS to check whether your WAEC is comparable to the UK GCSE qualification. However, it costs a small fee to do this comparison. Visit the ECTTIS website if you are interested in ‘converting’ your WAEC to UK GCSE.