'FTSE 100 freefall would see £350bn wiped off value of companies
!['FTSE 100 freefall would see £350bn wiped off value of companies](http://i.dailymail.co.uk/i/pix/2016/06/22/16/358D8B4B00000578-0-image-m-36_1466608573799.jpg)
A Brexit vote would send the London market into freefall, plummeting to levels of between 4,900 and 5,500, while wiping off more than £346billion in the process, according to investment house UBS.