I’ve heard international students don’t need ielts to get into UCL is that true ?
This is true but not for the majority. https://www.ucl.ac.uk/prospective-students/graduate/english-language-requirements In the link above, you can find a list of countries. People from the listed countries (for example New Zealand, Canada, Malta, Jamaica, etc.) do not need IELTS or any other exam that shows their level of English. Students from other regions need to take an English exam like IELTS for UCL.