Given the following reasoning and answer, what was the question? The important part for answering this question is: BST begins at 01: 00 GMT on the last Sunday of March and ends at 01: 00 GMT (02: 00 BST) on the last Sunday of October.
The answer: begins at 01 : 00 GMT on the last Sunday of March and ends at 01 : 00 GMT ( 02 : 00 BST ) on the last Sunday of October
The question Passage: BST begins at 01: 00 GMT on the last Sunday of March and ends at 01: 00 GMT (02: 00 BST) on the last Sunday of October. Since 22 October 1995, the starting and finishing times of daylight saving time across the European Union have been aligned -- for instance Central European Summer Time begins and ends on the same Sundays at exactly the same time (that is, 02: 00 CET, which is 01: 00 GMT). Between 1972 and 1995, BST began and ended at 02: 00 GMT on the third Sunday in March and fourth Sunday in October.

Question: Based on this passage, when does british summer time start and end?