There has been a general consensus among traders that in the event of an exit by Britain from EU, Franc will appreciate amid safe haven flows both from UK and Europe, in addition to the speculative drive. 

Similarly, economists are unified in their views that SNB will take up actions to prevent appreciation shock to swiss economy.

only four out of 23 economists surveyed by Bloomberg consider SNB will wait and see, while 2 think there will be cuts and 17 in favor of intervention.

Seems like, Pound won't be alone in its volatile journey.