Hello Stig,
It would appear that the Ansaldo was tested by the RAF after all. Please see answers to my question at:
https://www.greatwarforum.org/topic/...-with-the-rfc/
Had I known the serial I would have been able to say that aircraft was tested in Britain myself as WDF 130 P.6 has a little info, though not as informative as the two posts on the Great War forum.
Regards,
Clint