I have solved the crossword but cannot get over the final hurdle-shading in the grid to arrive at the two word "special occasion" which is surely "diamond jubilee" e.g. there are...
Office of bigwig outside church by Government House? (4,10) -i-e -r-s-d-n-y. It looks as though it must be life presidency but I do not understand how the clue works out. Thanks for any help.