Aviation is a clear and present indicator of the way the globe has established its response to meeting (or not) the Paris Climate Agreement. There is a limit to government and international policy action which can restrict an efficient pathway to decarbonisation. Aviation net zero future is critically dependent on a zero-emission energy revolution and commensurate institutional investment to meet the extreme shortage of “green” energy. A lot of airlines are performing better than net zero transition, yet the industry is perceived as a high carbon and risky stock by many who wish to “green” their investment portfolios. Furthermore, the carbon impact of capital may be greater in other sectors. We present our global perspective on how the City could hold the key to translating net zero leadership in the aviation and energy sectors into a real economic impact.