Interchangeable bumpers between different models/years?

Hello - I foolishly lent my Y-plate 1.4TDi to my ex-girlfriend who returned it with a huge dent in the rear bumper after reversing into a concrete bollard.

I need to try and source another rear bumper and I'm looking at breakers yards and ebay for a replacement. I'm just wondering - are there any differences between models and years? Will any rear A2 bumper fit any A2 or are there differences I need to watch out for?
They are all the same.

If you have rear parking sensors, then you need a bumper with the same, as the fixings for the sensors are not present in a bumper without the sensors.

Just get a like-for-like and you'll be good.