Hi when thinking about security, you have to take into consideration the type of door, the frame, the style of door, and where the door is located, always choose kite marked and insurance approved locks 3 lever or five,or Chubb, Yale, do research into each one,
I example door I have consists of a Yale lock security chain, and a five lever key lock all insurance approved and kite marked, they are also security screws with two “ screws and your budget is key the more you spend the better quality products you can have and you will get the certificates with the locks for your insurance.