Complex sentence: All its tutors hold degrees and qualifications in Teaching English as a Foreign Language (TEFL) at Level 7 and above, which under the UK educational framework refers to the postgraduate academic level of Master's.
Split into simpler sentences: All its tutors hold degrees and qualifications in Teaching English as a Foreign Language (TEFL) at Level 7 and above. Under the UK educational framework, Level 7 refers to the postgraduate academic level of Master's.