AV-8B+ variants for Britain:
Harrier FGR.11 - essentially the AV-8B+ with British electronic countermeasures, the extra pylons used by the RAF, and common ejection seats with the Harrier GR.5/7/9
Sea Harrier FAA.3 - similar to the above except usign the FA.2's radar and radome to ease the support requirements and using a straked version of the FA.2/FRS.1 cannon pods in place of the GAU-12 and ammo pods, again to esse the support requirements.