Does this apply to Tenerife also as well as Spain.

If so what actually is required. Providing your name date of birth and passport number should be easy enough. I have booked my flights separately from my Hotel with British Airways. There are 8 of us travelling. Can we supply the information to BA before we travel or do we have to wait at the airport in a queue of up to 300 people all having to do the same thing because if this is the case then the 2 hours time that they request we check in will need to be increased. We have had no contact from BA regarding this.
Has anybody been to Tenerife since the introduction of API