hi all please can someone tell me how to remove my rear bumper(with parking sensors)on my octavia mark2 estate

Hi - Guide here with pictures. My link

It worked for me.

Two things to note: There was white sealant between the bumper and the body around the two bolts either side. This stuck the bumper to the car even when the bolts and screws had been removed. Just pull off gently and stop if you think you have missed a screw.

Also pay attention to the screws n the wheel arch. There are four through the plastic inner wheel arch into the bumper through the mud flap. Easy to see but needs a very short screw driver if you don't want to take off the wheels. However, there is a sneeky single screw into the mumper through the steel body of the car at the very top/front/forward pointed edge of the bumper on each wheel arch. Hard to see and hard to find in the dirt. Make sure you get these off before trying to pull off the bumper.

otherwise the guide is fine.

HTH