Hello Michel,

In response to your queries:

1. Yes, there is no problem. However, as a resident and as being obliged to file your annual income tax, you should have appointed a fiscal representative in Spain that deals with your UK company fiscal obligations. ( yourself ). What I mean by this, is that your company should be linked with the Spanish employment and tax system otherwise you are not supposed to be carrying our any activity in Spain and cannot prove your sources of income here.
2. If you do not stay out of the country for more than 6 months in a year, you are not losing your residency status.
3. One of the documents required for the application of citizenship in Spain are related to those that prove your source of income in Spain and therefore you would need to have the UK company documentation in good order according to the Spanish tax system.

As you are married to a Spanish citizen, you can apply for Spanish citizenship after one year of marriage.


Best Regards,