Yeah it's the standard 3 bolt flange arrangement.
The down pipe flange looks fine but no matter how carefully I try and make sure it's on square and the nuts are tightened evenly it leaks at the bottom After a short while
I suspect it's the movement of the exhaust under the car causing it? Maybe it's just the connection between the system and downpipe being out of alignment so it eventually pulls the downpipe towards the rear of the car? (If the system is pushed too far onto the downpipe?)