2001: The trigger moment at the Met Office when the concept of Quantised Inertia (QI) began to take shape.2006: The first paper on QI, predicting the Pioneer anomaly and challenging the need for dark matter.2012: Application of QI to galaxies, demonstrating that dark matter is not required.2013: Proposing a mechanism for inertia and the possibility of propellant-less thrust using artificial horizons.