Could someone explain airport lounges to me please? We are flying from Heathrow in May half term, and for some reason when we booked our flights to France a few months ago, business class was only £27 more than economy, so we are flying business class. My question is what does that entitle us to at Heathrow, can we use any of the lounges, I see there are a few, or is there one that is run by BA that we can use? I know you can pay to go in some of the lounges, but we wouldn't want to pay anything more, so looking for what is included as part of our tickets. We are going from terminal 5. Thanks!