You're fine
I asked this exact same question recently at Gatwick. The credit is all about TK not the physical licence. The bridge is 5 exams. Interestingly though you don't need any exams to go do your IR(A). You could compress your conversion timeline by concurrently doing exams and IR before CPL (which is more efficient in minimum hours too (10 hrs IR followed by 15 hr CPL)). Only snag I've just had is whether IR(H) needs to be current for this route. Regardless your TK credit still valid (as previous respondent pointed out validity)