As the governing body (FIA) did not publicise the incident I cannot name anyone, but it was in the 'modern era' of the past two decades.
An example of how easy it is to get it 'wrong' - until the Records Commission has seen all of the paperwork for your bid, you the entrant cannot claim a record has been achieved. You may be allowed to say that an existing record speed has been exceeded but all publicity comments have to include "subject to FIA ratification".
My best guess is that Venturi BB3 have exceeded last years speed - but were they running in the same class?