diff --git a/prospect/kernels/base_kernel.py b/prospect/kernels/base_kernel.py
index abb8b63..059cf72 100644
--- a/prospect/kernels/base_kernel.py
+++ b/prospect/kernels/base_kernel.py
@@ -11,6 +11,9 @@ def __init__(self, config_kernel, task_id, output_folder=None):
         self.set_default_errors()
         self.id = task_id
         self.initialise(config_kernel, output_folder)
+        
+        if config_kernel.ignore_prior:
+            self.logprior = lambda x: 0.0
 
         self.param = {
             'varying': {},
@@ -109,7 +112,7 @@ def logprior(self, position):
         pass
 
     def logpost(self, position):
-        return self.loglkl(position)*self.logprior(position)
+        return self.loglkl(position) + self.logprior(position)
 
     @abstractmethod
     def get_default_initial_position(self):
@@ -178,9 +181,15 @@ class debug(InputArgument):
         val_type = bool
         def get_default(self, config_yaml: dict[str, Any]):
             return False
+    
+    class ignore_prior(InputArgument):
+        val_type = bool
+        def get_default(self, config_yaml: dict[str, Any]):
+            return False
 
     type: type
     param: param
     conf: conf
     path: path
     debug: debug
+    ignore_prior: ignore_prior
diff --git a/prospect/profile.py b/prospect/profile.py
index e471bad..5ca6db4 100644
--- a/prospect/profile.py
+++ b/prospect/profile.py
@@ -360,6 +360,3 @@ def validate(self, config: dict[str, Any]) -> None:
     start_from_covmat: start_from_covmat
     start_from_position: start_from_position
     start_from_profile: start_from_profile
-    
-
-
diff --git a/prospect/tasks/initialise_profile_task.py b/prospect/tasks/initialise_profile_task.py
index 753f7f7..d055491 100644
--- a/prospect/tasks/initialise_profile_task.py
+++ b/prospect/tasks/initialise_profile_task.py
@@ -2,7 +2,6 @@
 from prospect.input import Configuration
 from prospect.tasks.base_task import BaseTask
 from prospect.tasks.initialise_optimiser_task import InitialiseOptimiserTask
-from prospect.tasks.initialise_optimiser_task import InitialiseOptimiserTask
 
 class InitialiseProfileTask(BaseTask):
     """