You may be aware of the Terracycle Free Recycling Programmes for typically hard-to-recycle waste stream items.
https://www.terracycle.com/en-GB/brigades

It covers a range of product types that cannot be readily recyclable through the local bin collection service. Most popular and already implemented by some ISEP members is the Crisp Packet Recycling Scheme (https://www.terracycle.com/en-GB/brigades/crisppacket). Once collected, the crisp packets are separated by plastic type, cleaned, and extruded into plastic pellets to make new recycled products.

If further info is required or you want some assistance from ISEP to get involved, contact us at info@isep.org.uk