Stopping a producer selling it in a country is putting the onus on the producer.
I don’t think the narrative of producer v consumer is particularly helpful. Any regulation that hits the producer will also hit the consumer.
I’d be all for a ban on plastic bottles, but you need proper glass bottle deposit schemes in place first
Whether a producer is prohibited from producing or selling has zero affect on the UK consumer. I agree that a ban on production would be good, but in the vast majority of cases these are overseas producers, so that can’t be legislated for.