The defendant in a nuisance claim is served with a request for further information by the claimant relating to matters stated in the defence. No application has yet been made to the court. The request complies with the relevant procedural rules. It does not contain a statement of truth. The defendant's solicitor is preparing his client's response, which is to be provided voluntarily. The defendant's solicitor is unsure whether the response needs to include a statement of truth.Is the defendant required to provide a statement of truth in his response, and for what reason?