We were in that situation 2.5 years ago as the landlord said they were considering selling the house we were in but wasn't sure and a week later the letting agents for the house turned up with a young couple for a viewing and and a couple of weeks after that curiousity got the better of me so i checked the letting agents online seen as they were also estatate agents and yes you guessed it an advertisement of our rented property with sold across the pic in the ad so i thought oh well give it till friday seen as it was wednesday and nobody had bothered to inform us so i rang the estate and just asked if their was anything up with the property only to be alls and not to worry and then they hung so i'll not go on about and lets just say the air was very blue to say the least when i called at the estate agents so yes we too had too start looking for a new place to live which another quick move but hopefully my next move won't be till were ready ..