Rental -possession order help

[benoxr]

Can anyone tell me, when a landlord applies for an order of possession of the property, just how long that order takes before it is acted on. I need to buy some time here and this is why. I have a rental lease which expires on April 20th. The house I have being built wont be ready until maybe May 20th. I need one months lease and are willing to pay that month in advance. The owner/landlord, through the Agent, says she wont accept anything less than a 3 month lease. I have already said I wont be signing for 3 months knowing that I will have to cough up 2 months rent that I don’t need and plus they will make me pay their advertising costs if I break a 3 month lease which no doubt I will have to. There is no way I am going to move a family with 4 kids and my furniture to who knows where, for 3 or 4 weeks. If the owner applies for an Order of Possession, to force me out, how long have I got before they’re knocking at the door to remove us and the family? I’ve got to get prepared for a fight I think..
Any advice appreciated.
Cheers
shane