We present results on the fast-switching flexoelectro-optic response of high tilt bimesogenic liquid crystal mixtures. The tilt angles of these mixtures are shown to be high enough for full intensity modulation between crossed polarizers (φ > 22.5°) and in single polarizer devices (φ > 45°) at relatively low fields of the order of 2 V/μm and 5 V/μm, respectively. Furthermore, the maximum tilt angles that were observed were φ > 80°. In addition, the ULH texture required for flexoelectro-optic switching is polymer stabilized by adding a small quantity (~3 wt%) of a reactive mesogen to the mixture. Polymer stabilization has the effect of “pinning” the chiral nematic helix pitch thus reducing the temperature dependence of the tilt angle. However, the response time still exhibits a significant variation with temperature due to the viscosity. It is found that by curing at low temperatures, so as to obtain a long pitch, and operating at higher temperatures, it is possible to combine large tilt angles with fast response times.