"In matters relating to divorce... jurisdiction shall lie with the courts of the Member State... in whose territory… the applicant is habitually resident if he or she resided there for at least a year immediately before the application was made."
"A person's habitual residence is the place where the person has established, on a fixed basis, the permanent or habitual centre of his interests, with all the relevant factors being taken into account."
"By way of gloss on that, it does not have to be permanent. It needs to be habitual. The emphasis is on a person's centre of interests. The verb used is "established" and all relevant factors are to be taken into account."