Renting 1/2 Bedroom Flat in Luton

My name is Femi I have been looking to rent a 1 bedroom where my wife, daughter and I would live but it has been so difficult getting one. As a matter of fact when I search the internet I would fine the ones that i like and I will immediately indicate interest in the property to the agent in charge. The farthest I have gone in the renting process is filling of forms, the next thing I’ll hear from the Agent is the Landlord has shown interest in other tenants. Is it so difficult to rent a flat in the UK.