Island Bakery Oat Crumbles 125g. Our Oat Crumbles are the most versatile variety in the range. They are less sweet than some, yet sweet enough to satisfy a tea-time craving, and substantial enough with their jumbo oats, to keep you going for a while after. The more adventurous have found that they also go rather well with cheese, especially Isle of Mull Cheese, of course! So-called because our hearts melt and our knees crumble every time we think of these chunky chaps made from thick knobbly rolled oats and generous dollops of honey.