North Ayrshire are poised to step up patrols for this weekend's Old Firm clash.Officers say previous fixtures between Rangers and Celtic have led to anti-social behaviour, minor criminality, hate incidents and vandalism in the region.Now members of the public are being urged to "demonstrate respect and behave appropriately" ahead of additional patrols being deployed on Sunday afternoon.Area commander for North Ayrshire, Chief Inspector Alan Paterson, said: “We would appeal to all to behave