Since the start of the UK signing on to the F-35 Joint Strike Fighter (JSF) program years ago, it was briefed that one of the weapons to be cleared for internal carry by the end of systems development and demonstration (SDD) phase with UK jets was the ASRAAM AIM-132 air-to-air missile.
Now, according to a briefing by program officials earlier this year, it seems that the AIM-132 will only be cleared for outside carry--the non-stealth mode--by the end of SDD.
There have been other degraded affects with the AIM-132 and UK F-35. Back in 2008, program officials announced that it was just too much work to clear the AIM-132 for carry on internal air-to-ground hard-points. In each of the F-35's two internal weapon's bays you have one hard-point which can hold either an air-to-ground weapon or an air-to-air weapon. One door from each of the two bays can also hold an air-to-air missile. This gives the potential for the F-35 to carry 4 air-to-air missiles internally.
Originally the UK expected to have the ability to carry 4 AIM-132s internally; 2 for each weapons bay. With the 2008 announcement, that left the UK with 2 internal carry AIM-132s (hung on the internal part of one of the weapons bay doors) and the other two would be carried externally. In 2008 it was passed off that the external carry would be with low-observable hard-points to carry the missile but program officials have already stated that if you carry weapons externally, you are not stealthy.
A March 2012 briefing now shows no internal carry of the AIM-132 for the end of SDD.