When a warrant is issued for the arrest of an individual without a written warrant, can the accused be informed of the reason for their arrest?

In addition, Sopinka, J. in agreeing with the majority also made this observation in relation to s. 10(a) of the Charter as follows (wording in bold for emphasis): 2 Section 10(a) and (b) set out very fundamental rights of a person arrested or detained. The instructions to the authorities which they contain are relatively simple. In each case, the detainee is to be "informed". In the case of s. 10(a), the right is to be informed of the reasons for the arrest or detention. The right to be informed of the true grounds for the arrest or detention is firmly rooted in the common law which required that the detainee be informed in sufficient detail that he or she "knows in substance the reason why it is claimed that this restraint should be imposed" (Christie v. Leachinsky, [1947] A.C. 573, at pp. 587-88). When an arrest is made pursuant to a warrant, this is set out in writing in the warrant. An arrest without warrant is only lawful if the type of information which would have been contained in the warrant is conveyed orally. The purpose of communicating this information to the accused in either case is, inter alia, to enable the person under arrest or detention to immediately undertake his or her defence, including a decision as to what response, if any, to make to the accusation. It seems axiomatic, therefore, that this information should be conveyed prior to questioning and obtaining a response from the person under arrest or detention. These basic and important values are included in s. 10(a) of the Charter.