Andy I agree with you the only problem is that to lose bmibaby means the airport is losing 30-40% of it passenger throughput overnight. This is going to have knock on effects for all involved at the airport. We could be looking at job losses at not only bmibaby but also other areas at the airport. So the quicker a commited airline comes in to stabalize the place the better.
With regards to the LHR the prices are stupid, ok you can fly real cheap but there aren't that many tickets at the low prices. Many of the tickets and the ones the business man wants to use are £164 one way excluding taxes, bet its almost £400 return including tax, no wonder the LHR is suffering at the moment.