Aside from the operational and logistical reasons, could it also be that maybe, just maybe, fintech investors are betting on the liberalisation of free trade likely to emerge Brexit.
While many UK politicians are yet to acknowledge the frustrations of European economic protectionism on and over-regulation, investors understand all too well to their cost.
Removing these barriers while still selling to the EU across even small tariffs, as is done by the rest of the world, could usher a new era of lower prices and increased competition.
So when all is said and done, regardless of the Britain’s future relationship with the Single Market, it is hard not to see a future without the City at the beating heart of global fintech.
Tim Focas is director of financial services for Westminster think tank Parliament Street