Before you make this move you should consider a number of issues
What age are you? If retirement age you can get free medical care. If not then you need to be employed or self employed to qualify for healthcare. It is not a matter of being resident as in UK.
What will your income be? Pension? Is it paid in Sterling / euros how will exchange rates have an effect on your income.
Do I have sufficient Capital to last a few years while you establish yourself.
Do you have children ? Schools? How much Spanish do you and your family speak?
Easy access to friends and family in Uk? Have your family experienced separation from family before
getting on the padron and getting residencia is just the technical issues, what are the practical problems?
bring a right hand drive car will not be helpful, thought of changing it to left hand drive before coming over.
Personal goods brought over can be excempt from tax if changed over at the right time.
You must have a plan that is correctly researched and have a full understanding of the consequences before comiiting. There are many who have gone back. So really understand what you are doing. Problems are harder to reslove in a strange enviroment.
www.lhdplace.co.,uk
David Searl http://www.amazon.com/You-Law-Spain-David-Searle/dp/8489954259/ref=cm_cr_pr_product_top
Best of luck
David