Real or fake? Well, the breasts don't look like they've been siliconed, so there's that I suppose. As to the actual photograph, hmm. There's a few more nuddy ones like that on Xhamster, but like that one they break this site's rules on full growler exposure, so I'm not posting them.
It does look gen - with a fifty-fifty chance, either way, I'd say that that's a valid image of a much younger and kinkier Lorraine Kelly, taken long before she became the nation's mammy in the morning.