It's not a lie. That's the figure they put on 6 months of life, and that is the approximate threshold cost-effectiveness used by the NHS, via NIHCE - £30,000 per quality adjusted life year gained. It's not a threshold on the absolute cost of treatment, and nor do they claim it is. We'll spend hundreds of thousands on saving a premature baby, because that's an awful lot of healthy life years saved. We'll spend less per patient on curing acne because the gain is smaller.
Most treatments that are considered too expensive to use in the NHS are expensive because they offer very little health gain, not because the costs of manufacture are astronomical. £30k is a very reasonable threshold in the context of modern treatments and healthcare systems.