Like the trade ban you mentioned above, any other sort of ban, such as banning the buying of financial products from the UK, or banning flights from the UK to the EU is pure fantasy.

What is really the case is that Brexit risks causing British financial instutitions to lose their financial passporting rights, that allow them to trade in the EU.

As to flights, the risk here is that, without other international flight agreements for some UK companies (such as Ryanair and EasyJet) other than EU agreements, such companies risk losing the right to fly outside of Europe, or within the EU.

Both of the above are the result of international agreements being rendered invalid because of Brexit, and not some sort of punishment that the EU decided to bestow upon the UK.

Obviously EU competitors will step in immediately and eat the UK's lunch, wherever they find the opportunity. But I don't know what else anyone could expect. I understand the British are great believers in a free market, after all.

Indeed, as far as the UK is concerned, the market after Brexit is going to be almost completely unregulated.