Hi there
My wife and I are Canadian living in Canada but my wife is British and I have an entitlement to abode in the UK.  We wish to retire to Spain and were wondering if anyone can give us advice as to the best place to apply for a Spanish residency visa, Canada or the UK? 
If my wife hasn’t lived in the UK for a number of years, does that negate any advantage to being a EU citizen when applying for residency in Spain?  Would we have to live in the UK for a period of time to qualify for an EU residency? 
In terms of Health care, as my wife is a recipient of UK OAS, does she qualify to access National health again and is it applicable to access in Spain?
Thank you for any insight.