Based on the provided legal document, this case is primarily centered around the application for security for costs under Section 11 of the Arbitration Act 2005, rather than under Order 23. The case involves a dispute over whether the court should order a party to provide security for costs during arbitration proceedings, considering factors such as the financial capability of the defendant and the merits of the arbitration claim (!) (!) (!) .

The court's analysis and decision focus on the exercise of discretion in granting security for costs under the relevant statutory provisions, and the case discusses the considerations that should be taken into account when making such an order, rather than the procedural rules under Order 23. Therefore, the case is about security for costs under the applicable section of the Arbitration Act 2005, not specifically under Order 23.