If Scotland votes for Independence, that'll immediately relegate all the jocks living in England to the status of second-class immigrants who've deserted their own country to come take English jobs, housing and welfare benefits.
"WOT YOU DOIN IN OUR COUNTRY YOU BLEEDING JOCK?" will be heard in every English pub as the English go round looking for fights..

If the jocks want trouble they'll sure as hell get it!
(I've already sent a letter to the Scotsman newspaper saying "Will all the Scottish immigrants living in England go home if Scotland becomes independent?")