Thanks - my last backup was the official 9.3.2 (I think) - 100% no BETA. iOS 10 was the first BETA I put on the phone.
Right before I put iOS10 on the phone I made a backup.
At the moment I am restoring it with the latest iOS9 version, once done it will ask me to restore from backup and I will select the last iTunes backup. Let's hope it works!