The loss of spending from those employed in the current UK financial system will definitely be felt, just as the closing of a military base is felt. And the >10% of finance that does survive due to actual domestic demand will continue. This is not as bad as, say, the collapse of automobile manufacturing, which would leave the country totally dependent on imports for a basic good. What is important is how much can be made without need for much foreign exchange if the currency continues to be seriously devalued. It could well be that there are business people who were and are quite unhappy with the whole disinvestment parasitism of the financial sector and who will purchase on the cheap existing facilities where UK made goods could now again profitably be made and will start making them again. Ideally this would include new, high tech manufacturing processes such as are being developed around Oxbridge.

"It is not necessary to have hope in order to persevere."