Hold funeral service and speak firmly to cat. Three weeks later, cat comes into lounge with mouse in mouth and drops it. Mouse streaks for bedroom and disappears under bed and won't be moved. Decide to go to bed but bring cat into bedroom and shut the door. Spend sleepless night hearing cat on the hour chasing mouse.
Morning comes and mouse still there.
I catch mouse and evict once again. Cat got message. All quiet for eleven months. Hoping not to get an anniversary present.