Hi Colin, your mention of the Invincible class was a class never really improved during their lifetime. The harrier was innovative when they came into service, but when faced with conventional aircraft as when in the Falklands showed their i.e. too slow to engage. When she was diverted to Kosovo, the Americans after the first night, said she was too big a craft with small capability and kept her to the South out of the way, as she carried only one harrier. But she did manage to burn up sufficient fuel that most of the R N vessels were kept in harbour with the fleet practicing cruise drills tied up alongside with no gangway and the crews carring out seawatches etc, She was in the Gulf for nearly 6 months and only managed one take off, due to sun and extreme heat. Though as my elder brother who was in the mob , said to me "they half a dozen of them for convoy escort duty as Destroyers and frigates are too slow to catch nuke subs".