According to the Civil Procedure Rules (CPR) 39.5(2), the claimant must file the trial bundle not more than 7 days and not less than 3 days before the start of the trial. This provision ensures that both the court and the parties involved have adequate time to prepare for the trial by reviewing all necessary documents. The timeline specified helps in maintaining an orderly trial process, avoiding last-minute filings that could disrupt proceedings or disadvantage one party. 

Key Point: The Civil Procedure Rules set specific timeframes for the filing of trial bundles to ensure orderly proceedings and fairness in the trial process. Under CPR 39.5(2), trial bundles must be filed not more than 7 days and not less than 3 days before the trial begins, which helps prevent last-minute complications and ensures all parties are adequately prepared.