Ah ok great. I will try and unclipped it and tap the broken end of the bolt that may break the nut and clip loose. Cheers mate

I'm not freaking out so much now. I thought the nut was welded in.
Will walk round to the shop in the morning and see if I can find a decent nut and bolt to replace it.
Do you happen to no what size bolt to use? And does it have to be a hardened metal not or anything special?