Great advice about the wiggling technique, lubrication is also vital. Minimum 2 days prior to starting. The pin is tucked away so it helps to spray from all angles to make sure you get to it (removing all you can to give maximum work space is imperative and makes life so much easier).
Working from the top I used side cutters to grip the pin. It's soft but pretty strong so you can apply a bit of pressure and cut a small groove which gives added grip. With the side cutters against the the gearbox holding the pin (left hand) there's just enough room to get a small hammer and tap away until eventually fingers crossed you get some movement and it comes out.
Next comes the sensor, I advise giving it a little wiggle with the moles to test the water. If it feels solid give it another spray up, put the kettle on and give it an hour. Then carry on wiggling, wiggling really is key along with proper lubrication. If you snap it then you haven't wiggled enough! If you you don't get any movement after a good 30 mins of wiggling and lubing give her a poke at the base! Use a flat head and jam it down and inwards at a 45 degree angle and lever it. Then go back to wiggling! You should get some movement and eventually it pops out. Best feeling ever apart from popping it in!


Like a fool I didn't check the wiring to the sensor and just removed and replaced. Today after about 60miles of speedo assisted driving I was once again speedoless and stalling at junctions... Had a look at a suspect piece of electrical tape and wiggled that... Now it's working again, I'm going to strip the old tape off and insulate it properly.