Just read an article that virtually all contain plastic and cannot be composted and are only fit for landfill waste.
Thought I was doing my bit by composting them for years.
Apparently the only company doing compostable ones is Pukka and the others have "plans".
Loose tea must be the future...........

Buy Pyramid tea bags and when they are used build them into a pyramid and then fill with compostable waste before adding the top. Recycling, and reusing. Hope this helps.

Thanks for the tip i will be setting my alarm so i can be at the doors when Tesco Extra opens tomorrow morning.