This works well on all cars with drum rear brakes.
Stop normally. (Pressure to rear brakes is restricted in normal stopping.)
Do not yet apply handbrake.
Once fully stopped, push footbrake hard. You may hear the rear shoes creak a little as they are pushed hard against the drums.
Now, with footbrake fully applied, apply the handbrake. No excess force should be necessary.
Release footbrake.
Awesome! I'l give it a go