Quote from the KF website
"Kwik Fit guarantees purchased brake pads or shoes against accidental damage, wear and defects for as long as you own your car, provided you authorise all work identified as being required, during or at any future brake inspection."
In other words if for example you have a seized caliper pin this will have to be authorised to be replaced before they replace the pads under the lifetime warranty,this will probably mean a new caliper complete,note the words "all work" this could mean tyres,exhausts really anything KF do that could be deemed faulty.
Conclusion.... yes they will replace your pads under the life time warranty but before they do you will also need as it is "identified as being required" 5 new tyres,a complete exhaust system,new alternator and battery.
Hmmmmmm