How do members get to be part of the House of Lords?

by inheriting them

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This is wrong. Some do inherit their titles, but in fact the vast majority are created as life peers by the reigning sovereign on the advice of the Prime Minister. It is a very common misconception that Members of the House of Lords all inherit their titles. An example of a Life peer is Lord Peter Mandelson of Foy. An example of a hereditary peer is Harold Macmillan, 1st Earl of Stockton.

This answer is correct the British Parliament members of the House of Lords got their positions by inheriting them.