It's also a common mistake to believe that the Tranche 1 jets are AD capable only, they aren't, they have the capability to use the Litening pod and Paveway and in fact it was Tranche 1 (Block 5) jets that were used on Operation Ellamy over Libya in 2011.
True, but irrelevant to this discussion -
RAF to field retained Tranche 1 Typhoons as stand-alone air defence force | IHS Jane's 360