In 2019, Two Farmers became the first company to pack their crisps in compostable bags. The bags are made from cellulose & sustainably grown eucalyptus trees, and are 100% plastic-free. They are designed to compost down in 26 weeks. You can read more about it here.
Update: Which? has just issued a report on worst offenders for non-recyclable packaging. Sadly, crisp manufacturers are top of the table. The industry needs to do better and Two Farmers are leading the way.