Hi I am trying to swap front seats from a jtd active aircon to leather manual ffront seats is thre any problem with the new seats having side airbags and if so is there a solution.Also is it best to disconnect battery as I don't have the radio code.

You don't have to worry if your new seats have something your old seats had not. It's the opposite way that cause problems.

In addition to what Morty said, you don't need any radio code unless you put the radio in another car. Simply disconnecting the battery will not require the radio code to be used after the work has been carried out.