Simplex quick release wingnut nut doing what it's supposed..

[onyerbike531]

Re:

Thanks for all of your suggestions, I decided to take it to my local bike shop after because there's a few other bits on it that need some TLC.

 

[onyerbike531]

Re:

My local bike shop sorted it, turns out the quick release skewer had seized inside the axle, all good now.