I used to work with Pfas, but they do need to be banned | Letter

I was delightfully unsurprised to read your report (Chemical companies lobbying MPs not to ban Pfas, 29 August). Pfas really are a bigger problem than most people realise. I must confess to some involvement here: in the 1970s, when working for a big US corporation, I used Pfa-based chemicals in a widely used recipe for food-can sealants. On reflection, I needn’t have done, but the chemical company rep was very generous with samples and lunch, and there was never any suggestion that they might be harmful.