Switzerland is part of EFTA which is one step above the EEA [0] as-is my understanding. It would apparently take longer to negotiate this, however there is some political will for the UK to join [1] so it's not something that's impossible given a bit of time and exploration of each countries incentives.

Longer-term it might be better if the UK diversifies more, and begins to trade less with Europe, and more with booming Asian economies or countries which share its language.

Obviously in the short-term there will be a lot of noise: FUD and posturing.

[0] https://pbs.twimg.com/media/CmBqSu-WgAEFHSa.jpg:large

[1] http://www.swissinfo.ch/eng/european-economic-area_switzerla...