This former Swiss Air Force Hunter (ex J-4058) is owned and maintained by Hawker Hunter Aviation, and based out of RAF Scampton. It lost its civil identity G-HHAD in Nov 2006 and became a military aircraft again. ZZ191 is one of two Hunters operated under COMA regulations (Civil Owned Military Aircraft) by HHA, flown by FRA pilots for defence trials and simulations on behalf of the MoD.