Poplar-like (?) sapling along shady wooded path

Poplar-like (?) sapling along shady wooded path

Observation - Poplar-like (?) sapling along shady wooded path - UK and Ireland. Description: Somewhat like Black Poplar but the leaf base doesn't appear to be the right shape. Thick slightly toothed leaves, reddish stem. Petioles slightly hairy.

Somewhat like Black Poplar but the leaf base doesn't appear to be the right shape. Thick slightly toothed leaves, reddish stem. Petioles slightly hairy.