We too were waiting at the gate on Friday the 13th for this flight. I overheard somebody from the Birmingham flight saying that the EMA flight was being sacrificed in their favour, and good luck to us! After being moved twice to two different gates in the area we saw the flight departure time change to 00.11 the following day, and then heard the offer of vouchers being made over the PA system. We collected the €7.50 vouchers per person (less than the cost of a Burger King offering), and were given a duplicated sheet stating how "We deeply regret that your flight has been delayed. Rest assured that we will take all possible measures to minimise this inconvenience". It went on to say that we could rebook, by contacting the BMI ticket desk in AGP (which had already closed at 5.00pm) or ringing from abroad to 0044 8701 266 726 (a recorded message responded, saying that this service had been withdrawn) or from the UK on 09058 28 28 28 (presumably a premium rate phone number) which was unobtainable from abroad when we tried it twice. In the end we phoned a relative in the UK, who phoned the 09058 number, and made a new reservation for us. We await the bill for this call!
We are fortunate to have a property in Spain, so we hired another car, at higher than normal cost due to the on-spec booking situation, and drove back to our house, staying for another 4 days. We flew home uneventfully yesterday. We were amazed to hear of the actual delay experienced by the customers who waited.
We were disappointed both by the lack of information given to us by BMI, the fact that we were sacrificed in favour of the Birmingham passengers, and the frustration of being unable to make a new reservation from the airport. We felt seriously abandoned by BMI.