Quarterly: 1 and 4, gu a cross arg; 2 and 3, az an eagle displayed erminois between three castles arg

The full achievement is surrounded by the Collar, symbol of the Grand Master, within a princely mantle and surmounted by a closed crown.
 



 Matthew Festing 
Tenure  11 March 2008 -
Nationality  British
Langue  Grand Priory of England
Birth  1948/1949
Death
Notes  
Blazon

 Quarterly: 1 and 4, gu a cross arg; 2 and 3, az an eagle displayed or langued and clawed gu betw 3 towers arranged 2 in chief and 1 in base (Provisional)

 (Provisional)

Sources

I am indebted to Fr Guy Selvester (www.guyselvester.50megs.com ) for kindly providing me with details of the arms of  Fra Matthew Festing. These remain provisional until the official version is released.