Sorry I don't know whether the L13 and L16 series are still in service. In September 1992 there were over 100 different ammunition items on the T4 list. Some were marked as obsolete, some as no longer in use (possibly meaning obsolescent or simply all stock worldwide had been expended and with no likelihood they would be replaced by the same - which could mean there were newer replacement models for them). Many were CS, some were various pyrotechnic cartridges, electrical items, smoke signalling devices, flares, fire extinguisher cartridges, simulators and components for munitions used in training. They also included Chemical Agent Y3 Mk 1 and Mk2, which as I understand it were Mustard Gas, however both were marked as no longer in use. I believe that around that time the UK was keen to be able to declare it no longer had chemical weapons.