Yes mate that would be a better idea than beating windows in!
I know how easy it is to break into a Mk3/4 Escort, a mate locked my keys in an old Mk4 Escort estate I had and I just hit the bootlock with a lump hammer and it popped open first time! Broke into it within 5 secs! FFS lol
I think i've heard of something where you can have a small bit of wire exiting through the floorplan to pull and pop the doorlock if your alarm packs up? Not sure how that would work but...