When was the first UK broadcast when the official Barb ratings was 1085000?
create table table_26591309_2 (first_broadcast_uk___bbc_four__ varchar, official_barb_ratings varchar, PRIMARY KEY (first_broadcast_uk___bbc_four__))
select first_broadcast_uk___bbc_four__ from table_26591309_2 where official_barb_ratings = 1085000