To make sure that all was correct in our wills we contacted Casper, (English speaking)  at Pedro Feo.Carpena Sofio,  Notario, in Tortosa.
We made an appointment, went along and decided to make new Spanish wills. Casper was most helpful.
All he needed was passports and N.I.E.
The notary then explained the documents to us and we were asked to sign them. Total cost 46 euros each.
For peace of mind, well worth the money.