If you want something done slowly, expensively and possibly very well, you go to the British. While Britain created the immortal Spitfire, Lancaster and Edgley Optica, it also created a wealth of dangerous, disgraceful and diabolical designs. These are just ten plucked from a shortlist of thirty. In defining ‘worst’- we’ve looked for one, or a combination, of the following: design flaws, conceptual mistakes, being extremely dangerous, being unpleasant to fly, or obsolete at the point of service entry (and the type must have entered service). Grab a cup of tea, and prepare for ire as you read about ten machines they wanted your dad, grandad or great granddad to fly to war.
http://hushkit.net/2016/03/02/the-ten-worst-british-military-aircraft/