Some things are hard to recycle. So the Council doesn't collect them because there may be only a few of them, or it's expensive to find markets. Examples are crisp packets or contact lenses.
That's where Terracycle comes in, providing local places to recycle niche products. And they make money for charity in the process.
The Terracycle website tells you about local schemes and how to access them. They don't recycle everything, everywhere, but there could be a great local scheme that you can use. Or you might even like to get involved with Terracycle yourself.