"the phrase "marriage of convenience" is not to be given the meaning it had acquired in UK immigration law many years ago, before even the (now abolished) "primary purpose"
"where the relationship is entered into solely for the purpose of achieving residence it seems to us, as it seemed to the Tribunal in Kwonk , to undermine the very purpose for which the right is conferred. To argue that enquiry into the substance of the status would itself deter freedom of movement is to ignore that substance. We agree and follow the Tribunal in Kwonk in focusing on the substance and purpose of the relationship on which the right is founded rather than on the outward reflection of it. There has been some suggestion that this view would simply introduce the concept of "primary purpose" into community law. It is argued that for the Secretary of State to succeed in establishing a sham marriage he must show that there is no substance in the relationship. This is far removed from assessing the purpose and is to be decided according to the evidence produced of a relationship."