Yes...
https://www.theguardian.com/society...ients-die-waiting-for-beds-in-hospitals-study
You'll be able to buy 'fast track tickets' soon though I'm sure so you'll be ok.
Obviously it is horrible if anyone dies unnecessarily, but medicine is always a judgement call and doctors would have taken the judgement in those situations that people could wait and been unfortunately proven wrong. A healthcare system that allowed everyone to be treated instantaneously by a doctor would be impossible to fund.
I found this document (from 2018) very interesting, and I think it shows in a more dispassionate way the strengths and weaknesses of the NHS - https://www.nuffieldtrust.org.uk/files/2018-06/the-nhs-at-70-how-good-is-the-nhs.pdf.