Thanks for the suggestion Panda Perth. I have changed the connecting city to BGI, I now fly SJU to BGI to LGW to TUN. I have changed my ticket to route through SJU (not MIA), since I have found a cruise itinerary I like from San Juan. I am hoping that I can accomodate the cruise (timewise). I will book the SJU - BGI flight a day or two earlier than the BGI - LGW - TUN flights. I do appreciate your help.