Normalyy, the speaking module of the IELTS test is held seaprately, generally, on a day before. You can always speak to the organisers and schedule it as per yourc onvenience provided you have a genuine reason. IDP people are rather symathetic and cooperative in this regard.
Depending on whether you registered with IDP or the British Council for your IELTS, you may be scheduled for your speaking evaluation the same day as the exam or 1-2 days before or after. You do not get to choose.
IELTS speaking is always scheduled by IDP or British Council from whichever organization you have registered your exam. Usually, it is either sheduled 1-2 days before your exam or 1-2 days later on but there can also be a gap of 1 week between your speaking and IELTS exam.
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