I guess honour goes to OldP for isolating the area so quickly; Marks to Chevy for La Palma or Hierro - (I had to look hard for Hierro and I don't know how many alternative guesses one is allowed for a valid compete - anyone ??? ) and credit to Phil for the precise answer.
BTW Phil - while we were discussing the not-so-niceties of local politics, did you get rumbled by TS Rumbia/Gorio or did it pass clear enough ?
So Chevy has it -
with La Palma (GCLA Canary Islands and 28N 17W if needed
) but as he's declared OPEN HOUSE and in view of the aforegoing, I exercise my command prerogative and
offer the next challenge to Phileas Fogg for his precision.
LFH