http://www.publications.parliament.uk/pa/cm201213/cmselect/cmjust/96/96vw70.htm
“Vexatious” Requests (96)
3. Public authorities have expressed concern that section 14(1) on vexatious requests is hard to use. Index on Censorshipsupports the principle that the section should only be used as a last resort against those filing multiple FOI requests where no public interest can be demonstrated. “