Not bad ideas..but you're getting the wrong pic about the drive. You have the drive down the side of the house & where the car lives. Then behind that there is the gate..but it's only small. There are no front gates so it ain't the postie neither.

Where've you put this new light that's gonna keep waking the missus up mate? Can't be that bright surely? Get Taff to camp in ya garden..that'll scare the fookers!

Buzzer and camera seem the best ideas at the minute. Let me know if there's anything i can do mate.