I think it's likely to be a disaster but pretty fascinating all the same. If you check the faces of those who led the leave campaign this morning they all look slightly shell shocked that it actually happened. I think quite a few who voted for it feel the same way.
They had a choice. The first choice was to become a vassal state of the German fourth Reich, and see their country overrun by immigrants hordes from Turkey and Syria. The second choice was to keep the sovereignty, and to accept only the highly skilled immigrants. The brits chose the latter option, and I congratulate them for making the right choice.
That's too late for such concerns. London is now longer the great capital of the mighty British Empire, now that's more Londistan.