Broken Glow Plugs Freelander 1 TD4

Hi, I've just tried replacing the glow plugs on my TD4 Freelander, these have not been working properly. Unfortunately all 4 plugs were seized and have broken off leaving the threaded part still in the Head.
To remove them looks like a head removal job, which is far too much for the sake of it.....
Can I get away with putting it back together without connecting the glow plugs, and start the engine without pre-heating??
The existing plugs are still sealed tight in the head,

All 4 snapped? Head off job. Finding someone to remove 4 in situ would likely be more expensive than a HG and bolt set. Regardless of whether it starts OK without them, I wouldn't be tempted to use it as is, you could end up with bits floating about in your cylinders.

Thanks for that....
I've looked online and can get a glow plug removal kit for about £30, just wondering if anyone has had any experience on using them. This might be worth a try rather than head removal. Just hoping for some good tips, and if they're any good..

I suppose if you have to accept its possibly a head off job then technically you have nothing to lose by having a go with the kit. As said and very wisely so, beware of crap that may go south into your cylinders!!
Good luck and if you do get them out coat the new ones with some copper grease/slip.