There has been a lot written about "chaos" in UK government and financial markets since the Brexit vote, so much so there are supposedly folks who voted for Brexit who want a do-over.
A few thoughts:
- Short term changes in financial asset prices, like bank stock prices or currency futures, are largely irrelevant in the long-term. The recent supposed "big drop" in US equities markets, for example, took the market all the way back to where it was in... March, barely 3 months ago. You will see buying in these assets in the coming days and the drop of the last few days will be largely forgotten soon. Financial markets don't react well to being surprised, but they will get over it.
- I don't see how the UK and the pound are necessarily weaker post-Brexit. The US is fine. The Swiss are fine. Heck, the Swiss have to constantly fight to keep their currency lower.
- Unlike other EU nations, the majority of UK trade is with non-UK nations. While trade with the EU will likely be on worse terms in the future (though the Swiss and Norwegians have pretty good deals), UK will be unshackled from the EU bureaucracy in negotiating new deals with the rest of the world. If the US President had any vision whatsoever, he would already have offered the UK a free trade deal, rather than being petty and saying the UK goes to the back of the line for exiting a transnational body the US would never join itself.
- Much of the "chaos" in British government can be traced 100% to the anti-Brexit folks. The Anti-Brexit folks very explicitly refused to craft any Brexit contingency plans, using threats of post-Brexit chaos to try to up the pressure against the Brexit vote. President Obama did the exact same thing with Obamacare, refusing to create contingency plans if the SCOTUS overturned key parts of the ACA, hoping to ratchet up pressure against that outcome. Had their been at least the outlines of a plan, they would be checking down it right now. Things I would do as PM on the trade front: 1. Demand the Swiss deal from the EU for Britain. 2. Approach major trading partners with offers of free trade deals. A British commonwealth free trade zone is a great idea.