Trying to replace front brake hoses. Are they a two piece hose or is the metal bit. Just to hold it to the strut bracket. Can't get them undone.

They are a two-piece hose, held in at that bracket. You can hacksaw vertically down into the bracket, bend the metal aside and take out/put in brake lines without taking them in half or remove the strut from the car and leave the caliper there.

 

I'm sure you can buy one-piece braided lines to replace them too.

"PB Blaster" gets em all unstuck...took the two piece hoses to a shop here that makes new brake lines...20 minutes later had single pieces in place.

It's also worth noting that stainless braided lines aren't that much more expensive than rubber lines and all the braided KE70/AE86 lines I've seen are 1 piece.