My understanding of how things were before those amendments came into force in 2007 is that, while you may have been asked to provide identification at the poll, you were not required to do so unless the individual at the polling station, the official, had any concern about whether you were the person you said you were, when they looked down the list of electors.
So in many instances, if you had been living in that polling division for some time and had voted there before, you would likely have the correct information on the list of electors. Prior to 2007, you would go and say, “I'm Raji Mangat, I live in this polling division, and here's my name on this list; you see it”, and they would check it off and give you a ballot. If they had doubt that I was the Raji Mangat who I said I was, they could ask me to provide something to identify myself.
My understanding is that, when those amendments came into force, that's when it was obligatory to provide identification. Up until that point, you may have been asked for it—and common sense would dictate that people would keep it on hand in case they were asked for it—but you didn't have to.