It is best for these to be composted in your garden.
Alternatively, you can dispose of them in your food waste bin (or one available nearby). Councils should collect your pouches from these.
If none of the above options work for you, you can dispose of the packaging in a general waste bin and the bio-plastics will naturally biodegrade. This would, however, take a significantly longer period of time, so if you can find a compost bin near you, please use it!