Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
How much tonnage has a Fate of sunk, and a Flag of great britain, and a Date of 26 september 1940, and Deaths of 2?

### Inputs:
table_name: table, columns: ['Date', 'Ship Name', 'Flag', 'Tonnage ( GRT )', 'Fate', 'Deaths']

### Response:
SELECT SUM Tonnage ( GRT ) FROM table WHERE Fate = sunk AND Flag = great britain AND Date = 26 september 1940 AND Deaths = 2