I had a quick google. There's a Jeff Gallagher of East Grinstead, Sussex who is on Facebook, who writes poems and co-hosts a poetry blog and looks like he might be who you're looking for. He's definitely the
One Hand Clapping guy you mention: it's the same blog.
You could PM him on Facebook, or just reply to his latest Facebook post announcing poems in Makarelle magazine and the Runcible Spoon (as PMs from non-Friends are often missed.)
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https://www.facebook.com/jeff.gallagher.1614
He's
on linkedin too.