I used the SOU - IOS service a few times satisfactorily.Southampton offers a 1 hour 12 minute train service to central London and from an Air traffic point of view saves a relatively slow moving aircraft getting caught up in the complications and delays of the London area airports elaborate arrival procedures.My wife did not enjoy the delights of the Twin Otter on what seemed quite a long flight.The fare was very substantial too!! VBR Stampe