After spending a whole morning doing research, I can now say with some confidence that the cast are: Jean Valjean: Chris Jacobsen (alt) / Javert: Stewart Clarke / Fantine: Ellie Ann Lowe (u/s) / Éponine: Amena el-Kindy / Thénardier: Luke Kempner / Marius: Will Callan / Cosette: Phoebe Williams (u/s) / Enjolras: Ben Culleton (u/s)/ Mme Thénardier: Claire Machin.