“…Millharbour Management Ltd v. Weston Homes Ltd [2011] 3 All ER 1027 at [22(1)], Emerald Supplies Ltd v. British Airways plc. [2011] Ch 345 at [62], and In re X (Court of Protection: Deprivation of Liberty) [2016] 1 WLR 227 at [124].…”
“…As regards the definition of the class, Mummery LJ had said in Emerald Supplies Ltd. v. British Airways plc [2011] Ch 345 (“Emerald Supplies”) at[62] that “[a]t all stages of the proceedings ... it must be possible to say of any particular person whether or not they qualify for me…”