Bathroom silicone does work well with just a little burning.
Some chippies here are selling Pollack to help out those with less money. My favourite chippy will often give away some items if he is aware they are struggling. Now that man is well respected here and Iranian birth but lived here since a small child.
He always has the best quality cod so i dont go to any other shop now.
Of course, when touring UK, i hunt down a good chippy for evening meals.