In a dispute over rent escalation provisions, Aircraft Lessors sought an order for disclosure of data held on mobile phones of the Saudi Arabian Lessee’s employees. The employer’s right to possession/ access to the phones, pursuant to Saudi law, could not be made out, nor (c.f. English law) could such right be presumed. Therefore, the necessary “control” element for an order under the Disclosure Pilot Scheme (PD51U) was absent, and the Court had no authority under CPR to order exercise of “best endeavours” to obtain documents not within a respondent’s control.