Op 31 maart 2016 schreef de Britse Ambassadeur:

The Honours Department of the Foreign and Commonwealth Office in London have told that they do not keep records that far back in the honours database, but they have received the following information from the Central Chancery of the Orders of the Knighthood, which is part of the UK Royal Household that administers the honours system:

“According to our records, Father Anselmus Musters was appointed an Honorary Member of the Order of the British Empire by King George VI on 18th June 1946, in recognition of his services to Prisoners of War as a Member of the Escape Organisation in Rome.  I regret we don’t have any more details – the recommendation was made by the War Office in February 1945.

Father Musters, whose address was then 3 rue des Academies, Ghent, was presented with the MBE by the British Ambassador in Brussels on 18th June 1948.

In common with other Honorary awards, this wasn’t published (and in any case it would probably at the time have been unsafe to do so. 

MEMBER OF THE MOST EXCELLENT ORDER OF THE BRITISH EMPIRE  (MBE)