cbrad
You can check whether the area you are moving to is a UC area by using the following
ucpostcode.entitledto.co.uk/ucdate If you intend to use the capital from your house sale to purchase a new property then the funds should be disregarded for at least 26 weeks.
Moving to a UC area should not require you to claim UC unless you need to make a new claim for a UC related benefit, Housing Benefit for example, however, there appear to be significant omissions from the DWP's training and apparently ESA(IR) claimants are often being told that they need to claim UC, this is not the case and if pressured to do so then you should get face to face advice from a trained advisor.
Gordon