THE BBC 1 documentary on the Salford Pals, entitled ‘The Somme — From Defeat to Victory’ (July 2), was just about as upbeat an account of the catastrophe of the Somme as one can hope to get — namely, hard-earned lessons of July 1, 1916 put to good use by increased tactical ingenuity and flexibility (aided by the invention of the tank) to support the French position at Verdun.