The actor has made a documentary series about women’s lives today. She discusses power, single life and why being skinny didn’t make her happy The Guardian Kathy Burke is distracted. It’s the hottest day of the year, and she is desperate for a fag and a brew. “I’m gasping,” she says, disappearing outside for a couple of minutes before we start our interview. “It’s so hot, mate,” she says, when she reappears. “I wouldn’t normally leave the house on a day like this.” Then, just when I seem to have her full attention, her eyes dart upwards as she catches sight of a TV screen in the bar we are…