You should prepare at least two contacts for professional or personal references. Include their name, their job title and company, their relationship with you, and contact details. Always ask permission from the reference to be included.
Your two references should include your latest employer and can include personal references such as a tutor or teacher.
References are usually contacted once you’ve been given a preliminary offer. Your new employer will ask a series of questions to make sure you’re of high personal or professional character.