Who criticized Hazlitt as part of the so-called 'Cockney School of Poetry'?

Explanation

John Gibson Lockhart, a Scottish author and critic, was among the Blackwood’s Magazine contributors who disparaged William Hazlitt along with Leigh Hunt and John Keats by labeling them members of the 'Cockney School of Poetry.' This term was used derogatorily to suggest their poetry lacked refinement and was linked to London's middle-class literary scene.