I booked a BA flight using points on Alaska Airlines website. I booked a business class fare and I'm flying from FCO>LHR>SAN with no stopover. However, only the LHR>SAN leg is in biz class and FCO>LHR is in euro traveler. Can I use the lounge in FCO? My family is also flying on the same itinerary but they do have biz from FCO so certainly they have access to the lounge. I'd love to join them, LOL! Thanks!