Now driving it was rattling, so I checked twice and it was still secure and in place. We opened the bonnet later on today to find the breather filter had fallen off. On closer inspection, it had snapped off right after the point where it was secured to the copper pipe by a jubilee clip. We also found a huge dent in the filter. Pictures are below:




What has caused this exactly? Have I done anything wrong? Looks like I'll need a new filter, so can anyone recommened one that fits directly onto the crankcase breather tube without any pikey engineering methods. That's £15 down the pan already and I've not had it on 24 hours. Just now I'm using kitchen tissue as a breather filter!
Apoligies in advance for being a complete idiot as usual!