Lola is currently facing scrutiny from a strict social worker over the way she is bringing up her baby daughter Lexi. The storyline comes to a head later this week as she has the youngster taken away from her after being arrested for assault.
Harold told the Daily Star: "It breaks her heart when Lexi is taken away. She is broken, but she is a good mum. There's no reason why you can't be a good mum when you're young and I think it's really good that they're showing this.
"I wasn't glad when I found out Lola was going to lose Lexi, but I thought, 'Okay, at least I get a bit of a break'. It really is hard work playing a mum with a little baby. I'm there trying to keep them occupied while also trying to act and remember lines.
"But it has been amazing working with babies. You just never know what they're going to do next. And I like what it's brought out in Lola."
EastEnders fans will see Lola fighting to win Lexi back in scenes which air later this month.