Any express obligation to insure land against war damage shall be void and be deemed always to have been void, and any obligation to insure land against fire or other risks shall be construed as not including and as never having included, an obligation to insure against war damge, and any proceedings pending at the passing of this Act relating to any such obligation to insure land against war damage shall be discontinued upon such terms as the court thinks just:
Provided that the foregoing provision shall not affect the exercise before the passing of this Act of any right or remedy arising in consequence of a failure to perform an obligation to insure against war damage, but the court may, on the application of any person prejudiced by the exercise of any such right or remedy, grant such relief as it thinks just.