Unless the one being libeled decides to file a civil suit and successfully meet the burden of proof/legal threshold to prove it as such to the judge and/or jury, the characterization itself could be plausibly argued as “libel” against mattress girl as well by your open definition.
Well…unless he decides to attempt to file the suit in UK courts which have a much lower threshold and place the burden of proof on the defendant in libel suits…and they accept they have jurisdiction and accept the suit into their court system.