Beeping when backing up

Hi pam from the uk ! the reverse signal/beep can be disconnected however there are different methods of how the beep is operated ? in uk some cars have the reverse light bulbs that are also a beep sounder when reverse engaged ? orthe sounder may be a seperate sounder unit at the rear located either in boot? or behind rear fender? or as you mention beep sounds inside boot area?? the sounder may be hidden behind one of the side panels in boot? if you put ignition on and select reverse then try finding beep location? if/when you find it? just disconnect wirefrom sounder and make sure reverse light/s still remain on tape up the wire disconnected out of way? if it is the bulbs that bleep? you will have to remove and fit an ordinary type bulb usually a flasher/ indicator bulb? hope this is of help and inspires you to diy ? best wishes