A secure front door is a system, not a single feature. The frame, the lock, the cylinder and the glazing all need to work together - and any weak link undermines the rest.
Look for Secured by Design accreditation, a multi-point locking mechanism, an anti-snap TS007 3-star cylinder (or a 1-star cylinder paired with 2-star security handles) and hinge bolts. Toughened or laminated glass adds another meaningful layer.
Every Lifetime composite and uPVC door is fitted with multi-point locking as standard and can be specified to full Secured by Design standard on request.