CREATE TABLE table_70223 ("Date" TEXT, "City" TEXT, "Event" TEXT, "Winner" TEXT, "Prize" TEXT)

The prize of 1,000,000 was given by an event in what city?
SELECT "City" FROM table_70223 WHERE "Prize" = '£1,000,000'
SELECT "City" FROM "table_70223" WHERE "Prize" = '£1,000,000'