With my last breath I'd defend Brexit

 Were I a newly ennobled hero who could the Nation rouse
& tho' horse after horse sink under me, yet win at Cowes

With my last breath I'd defend Brexit

Long after the last Banker legs it.

Envoi-

Since Volatility's jump is Liquidity's sump or else Creodes' Sea-roads shrink.

Prince! Thy vaunted moat is only such crusted port as Dons were wont to drink.