Yes, pay off that mortgage. To be honest, the only reason I'm able to be retired at 55 is because I paid off my mortgage. If I hadn't done that, then my pension wouldn't really be enough to pay bills. But since now I have no bills, it works out.
Debt-free is the only way to be truly free in my opinion. Good on ya, mate!
One of the main reasons I retired early. I actually liked my jobs, I just hate being on anyone else's schedule. It seems so petty, but I gave up a lot of money just to be on my own schedule. lol