Tokamak Energy are developing novel HTS technology targeting demonstration of net fusion energy gain in the world's first compact superconducting spherical tokamak: ST-F1. This talk will review our progress to date, starting with the development of small non-insulated quality assessment (QA) coils is 2018, which were used to characterize HTS tape from multiple suppliers, through demonstration of a 44 mm cold bore all-HTS solenoid which achieved 24 T peak field on coil at 20 K in 2019. The talk will also discuss the challenges and progress towards scaling up this technology for fusion magnets using a novel type of insulation that allows an optimum turn-to-turn resistance to be chosen. A large scale magnet incorporating this insulation method (230 kJ, > 6 T in 180 mm cold bore) has recently been successfully tested and preliminary results will be reported. A mid-size tokamak magnet set (incorporating toroidal and poloidal field coils, with 16 MJ stored energy targeting over 20 T peak field on coil) is currently being manufactured and is due to be tested in 2021.