Please help identify what I've snapped!

Hi,

Mini One 1.4 Petrol 2008

Just a little background, I serviced my partners car today (just new spark plugs and an oil change/filter change) and everything was working fine. I just went to pick her up from work in the car and the brake pedal went REALLY hard to press and struggles to apply the brakes at all.

When I got back I opened the bonnet to see if anything was amiss and me being a moron looks like I snapped something (no idea what). I was just wondering if anybody could tell me what it is and better yet how to replace it?

http://i1373.photobucket.com/albums/ag372/nbzpew/IMG_0680_zpsd39fc3a5.jpg

http://i1373.photobucket.com/albums/ag372/nbzpew/IMG_0679_zpsf26d3e10.jpg

http://i1373.photobucket.com/albums/ag372/nbzpew/IMG_0681_zpsf9e7aa16.jpg

Any help would be greatly appreciated as I have to take it needs to be MOT'd tomorrow too :(

Thanks,

While I'm not familiar with the Mini, it appears to be a fitting for either the PCV system or possibly the EVAP system. Looks like there is a Torx type screw that holds it in place. The broken half can be removed from the hose. Check with your dealer parts deptartment for more info.