These files form the open data deposit for the article "Partial hybridisation of electron-hole states in an InAs/GaSb double quantum well heterostructure" by C S Knox, C Morrison, F Herling, D A Ritchie, O Newell, M Myronov, E H Linfield and C H Marrows, published in Semiconductor Science and Technology. "12T SdH v T" Corresponds to Figure 2 a), "12T Quantum Hall V T" corresponds to Fig 2 b) and "C1295 SdH V Temperature compilation" corresponds to 2 c). "9T Plateau resistance" corresponds to figure 3, "eff mass fit" corresponds to figure 4 a), "dingle fit" corresponds to figure 4 b), " 9T Sheet resistance min V T" corresponds to Figure 5 a) and "eff mass 9T fit" corresponds to Figure 5 b)