Steering Pulls to the Left

Hi all, please bear wiv me as I am a Dumb Blonde wife who has no knowledge about mechanical things posting this on behalf of a mechanically savvy husband who is computer illiterate!!!

Land RoverDiscovery II (1999), pulls over to the left, steering is straight, wheels have been balanced, tracking is fine....... What could the problem be?

Are the tyres exactly the same across thecaxle - not just the same size - but the same manufacturer as well - any doubt, swap them over and see if the symptoms change

All the tyres were bought together and r same make etc!

Have the brakes been checked over?

i had the same problem myself when i brake the steering pulled to the left. with my 90 i put new brake pads on and changed the fluid as well. hope that might help