“The joint statements of the medical experts … agree that the Claimant is at some, albeit small, risk of developing a cyst (syrinx)”, involving a risk of “a significant deterioration in his physical or mental condition”; that “[t]he parties have resolved the claim on the assumption that the Claimant will not at any future date during his lifetime develop a syrinx in a manner that leads to a significant deterioration in his condition and that if he should do so then he should be entitled to apply to the court for an order for further damages”; and that “the parties are agreed that the risk of syringomyelia is one that it capable of satisfying the test identified under section 32A”