As I hinted upthread, let's not turn this into a person attack! I don't have to defend my desire to help protect the environment.
There used to be a recycling point for carrier bags/polythene at my local Sainsbury's which I used but that was removed probably more than 10yrs ago (remember when we naively used to throw carrier bags away before they became such a valuable commodity) and there has been no publicised alternative to landfill offered since, either by local authority or retailers.
According to the latest Tesco list my nearby store isn't included in the soft plastics scheme (Not that I would shop at Tesco's anyway) so currently, despite being willing to increase my recycling this way, I do not have the means to reasonably do this. The only option currently available is to continue sending soft plastics to landfill