ahhhhhh snapped glow plug

[highlander]

Frightening and lucky, all at once!

You should check to ensure there's no "bits" of the plug or the threads fallen in though, as that can be serious.

[Welly]

Well the cylinder is under immense pressure so should have spat the whole lot out (quite funny, and lucky for you).

You're not going to know if any bits went in there and there's little you can do about it, if the car seems fine otherwise then just forget about it

[modified406]

a doubt any bits went in as it was a clean break but the cars running fine
another wee question how much is this modified loom from peugeot for the rail sensor