You have to delete them all individually, but if you click on "block" at the bottom of the ad it will block that advertiser from posting on your wall in the future. It's a bit of a pain to start with, but definitely worth it!

Unfortantly these adds are how ukbride makes its money which enables us to have fantastic prices for the pu monthly comp and other things like that so there is no way to stop them apart from going through each one individually and deleting them.
As above it is a pain at first but if you do block each company when they pop up they cant come back so worth it in the end :-)