 
<translate> Ihe dị mkpa iji zaa ajụjụ a bụ: A na-ejikarị okwu ahụ eme ihe maka nzuko omeiwu nke United Kingdom n'ihi na ọtụtụ mba nke Alaeze Ukwu Britain n'oge gara aga nakweere ụdị ọchịchị onye kwuo uche ya nke Westminster. N'ihi ya, azịza ikpeazụ bụ n'ihi na ọtụtụ mba ndị so n'Alaeze Ukwu Britain n'oge gara aga nakweere usoro ọchịchị onye kwuo uche ya nke Westminster. <eng> The important part for answering this question is: The expression is often applied to the Parliament of the United Kingdom because of the adoption of the Westminster model of parliamentary democracy by many countries of the former British Empire. Therefore, the final answer is because of the adoption of the Westminster model of parliamentary democracy by many countries of the former British Empire. 