I’ve been given a Conditional offer for another job which is very good news. However I’m at another workplace tomorrow to cover staffing issues. New job place has said if I accept they will begin the onboarding process which is fine. However should I let my Boss know tonight or tomorrow that new work place will contact her for references or should I accept the offer and let the new place know that I will give my notice in on Thursday as I am not there tomorrow. My Boss is the type who would want something like this done face to face rather than by phone/email etc