It's nothing like Jablonski's signature, I'm afraid. (I've just compared with a known real one - his writing is tall and thin and loopy and quite legible.
I had wondered, from looking at the piece and knowing your location, if it might be Stuart Akroyd, but it doesn't look as if the signature could read that, although it does look a little like his work.
Could it be by somebody who works with him?