Yes, as everyone has said, it's a weever.
-Note we only have 2 species of venomous fish in our waters, the lesser and the greater weever, nothing else is venomous no mater how spikey and ugly it looks.
The only fish that is poisonous to comsume as far as I know is the Sunfish (though I've a niggle in my mind that there's is something else that turns up in the summer down south).