 ESSEX, United Kingdom--BUSINESS WIRE--IAA, Inc. NYSE: IAA, a leading global digital marketplace connecting vehicle buyers and sellers, today announced that its UK-based business unit has expanded its payment offerings through the addition of Payit by NatWest, a fast, safe and secure mobile transaction and digital payment solution. Using Payit, IAA buyers can make payments directly from their bank accounts for vehicles purchased. Payit saves our buyers time and creates more flexibility by q 