One of my regular destinations......

You will have no problem arriving 90 mins prior to flight just make sure you have a copy of your e-ticket printed as they wont let you in the airport with out this ... there is also a different entrance for CW and F pax if you carry on walking past the main entrance you will see a 2nd entrance which is meant for premium pax. Also there are 3 security checks to go through, 1 prior to check in then 1 KAA check at the gate then a BA security check before boarding ....... NBO has got better over the years but the lounge is terrible and the shops still stock the same items as they did 10 years ago. Ive been to a lot worse!

Enjoy NBO