[On euro clearing moving from London] there is no need for currency clearing to take place in the currency’s jurisdiction. It is broader discussion in the political realm.
Erm, that would mean that clearing could continue to happen in London whether in or out of the EU.... Which then means that banks would have to decide if it was "in their interests" to move, not that they would lose the right to clear transactions.
10% corporation tax is sounding much more interesting.