England's foreign policy for centuries has been to allow no strong power on the Continent. Hence the centuries long struggles with France. Playing off France and Austria. Supporting Garibaldi against Austria.
The later support of and "alliance with" France was to thwart the growing power of Germany,

What now? fighting the German bankers? Assuming US support? Well I admit that either of the brain-damaged jamokes running for President probably will support the UK. But Johnson might go too far with "l'état, c'est moi".