JN - Threshold Block 3 weapons for the B remain AIM-120C AMRAAM (internal), AIM-9X/ASRAAM (external), 2k JDAM (internal) and 500lb Paveway (either). According to Defense News, the UK jets will use the remaining ASRAAM current versions until they are replaced by the CAMM-based CSP in 2022. As long as the current inventory of AMRAAMs includes C-models, they will fit. I have no idea whether the UK is buying gun pods.