My flask application for handling this URL somehow has started corrupting the URL for the css file. Browser Gets this served file (note the word add at the end) http://XXXXXXX.pythonanywhere.com/question/0/add within it..... <link rel="stylesheet" type="text/css" href="static/quiznite.css">

Browser pulls in this
http://XXXXXXX.pythonanywhere.com/question/0/static/quiznite.css

when really it should be getting

http://XXXXXXX.pythonanywhere.com/static/quiznite.css

My code is this...

@app.route('/question/<int:id>/<string:action>', methods = ['GET', 'POST']) def web_addquestion(id,action):

some code!!!!

That's because that's what you're telling it to do. static/quiznite.css is relative to the page it's in. If you want it to be an absolute path, then use an absolute path: /static/quiznite.css

Thanks! Colour and all the trimmings have materialised cheers!