If you took a Cambridge IGCSE English language qualification, you will need to know which syllabus you took when you submit your UCAS application. This is because universities want to know whether you have taken all four components of language skills (reading, writing, speaking and listening). Your Cambridge IGCSE Statement of Results gives this information in full. Alternatively, your English teacher will be able to help.
The Instructions for students applying to study in the UK through UCAS with Cambridge IGCSE English language qualifications document explains how to check which Cambridge IGCSE English language qualification you took and how to enter these details on your UCAS online application form.