“Where parties intend to create a contractual obligation, the court will try to give it legal effect. The court will only hold that the contract, or some part of it, is void for uncertainty if it is legally or practically impossible to give to the agreement (or that part of it) any sensible content.” (citing Scammell v Dicker[2005] EWCA Civ 405 , para 30, Rix LJ).”