I asked my neighbour who works in a chippy what fat do they use,she said vegetable that comes in big blocks like lard,she had a word with the owner and he let me buy a box of him for a tenner but they tasted the same as when i use veg oil,so i asked my neighbour the secret she said,if i had a fryer as big as theres and used as much fat as they do,cooked as many chips together as they do,on the same temperature as they do then anyone could make chippy chips,there chips are so good i go there often and checked they are ok for a veggie because i take some home for one so you can forget the beef fat idea.