Following a thread, I note that anyone being proposed to join the UK's Chivalric Order of St John (the "parent" body of
inter alia St John's Ambulance) has to declare that they are not, nor will become, a member of a Specified Body, which is defined as:
A Specified Body is, broadly, a body which says it is an Order of St. John organisation or one which uses the eight-pointed white cross as its emblem, but is not one of the Mutually Recognised Orders referred to in Section 3.
'Our' Masonic Order of St John of Jerusalem, Palestine, Rhodes and Malta would appear to fall within the definition :(
Perhaps our Grand Master should have a quiet word with his Cousin, Her Majesty?