Appeared this year in a thicket of “wilder roses” we have in the yard. Has vine like growth, would estimate 8 - 10 feet this year. Mature leaves ca 3” long, smooth on the underside. Has just started making small green berries.
Ditto to Bittersweet Solanum dulcamara. Native in Britain, valuable for wildlife; the fruit is mildly toxic for people, but you'd have to eat a lot to come to harm. Birds can eat them safely.