Hi Alan 

Just started my TIE exchange and for those who want to DIY I’ve put a link on with comprehensive instructions and guidance including booking an appointment and touch wood it’s worked.

Apologies if this has already been posted, can’t remember where I downloaded it from.

https://www.visit-andalucia.com/one_post.php?id=847&title=how-to-apply-for-a-tie-card-a-step-by-step-guide