Yes, Honest Jon's has operated for many years from the Portabello Road location and they have also issued some good Ska music compilations on their own label as well. Haven't been in for quite a while but I heard that the jazz section had shrunk somewhat in size (used to be in the basement) so doesn't sound to good. Anyone been there of late?
Just down the road from Honest Jon's in Portabello is Intoxica, outlet for the world's most expensive Blue Note and rare British Jazz vinyl ( ).