Only one trust has hit all its targets over the past year
NHS waiting times for cancer treatment, planned operations and A&E have worsened across the country.
England, Wales and Northern Ireland have not hit one of their three key targets for 18 months.
Scotland has hits its A&E target three times in the past year.
The BBC analysed performance across the 135 hospital trusts in England and 26 health boards in the rest of the UK.
Locally there is just one service in the whole of the UK – run by Luton and Dunstable NHS Trust – which has managed to hit all three targets each time over the past 12 months.
Hospital staff told the BBC that shortages of doctors and nurses, a lack of money and inadequate room in A&E departments were making it difficult, sometimes impossible, to see patients quickly enough.
The chances of not being seen in four hours in A&E has more than doubled in the past four years, with one in nine patients now waiting longer than that.
Wales has consistently failed to hit its targets. In 2012-13 it did not hit any of its monthly key hospital targets and in 2016-17 it was the same. The last time a target was achieved nationally was 2010.
England has seen the biggest deterioration. In 2012-13 it hit its key hospital targets 86% of the time, but in the last year it has missed every monthly target.