This report presents the heat transfer modelling, design, construction and experimental in- vestigation of a 40.29 KWhrth laboratory scale combined latent and sensible heat storage for concentrated solar power. The combined storage consists of a 3.97 KWhrth “latent” heat stor- age section, containing the eutectic alloy of Aluminium and Silicon, AlSi12, encapsulated in stainless steel tubes, placed on top of a 36.32 KWhrth “sensible” heat storage section, compris- ing of a packed bed of rocks. Adding a thin section of phase change material, comprising less than 7% of the total storage volume, on top of a sensible heat storage is observed to provide a highly stabilised outlet air temperature during the storage discharge cycle. Experiments show that, for a comparable range of air mass flow rates, the discharge outlet air temperature for the combined storage decreases by only 10-15 ◦C, in comparison to a 72-112 ◦C drop in tem- perature observed for a sensible only storage with the same volume, over the same time period. The combined storage concept can hence be used to provide heat at approximately constant temperatures over a significant time period for power generation or process heat applications, at little added cost, while maintaining the high thermodynamic efficiencies characteristic of thermally stratified single tank sensible heat storages.