Table schema:
CREATE TABLE table_name_8 (tonnage__grt_ VARCHAR, nationality VARCHAR, date VARCHAR)

Question: How much tonnage Tonnage (GRT) has a Nationality of united kingdom, and a Date of 27 june 1941?
SQL: SELECT COUNT(tonnage__grt_) FROM table_name_8 WHERE nationality = "united kingdom" AND date = "27 june 1941"