diff --git a/python/core/processing/qgsprocessingcontext.sip b/python/core/processing/qgsprocessingcontext.sip
index 3173c853274..ea9b25ca7bb 100644
--- a/python/core/processing/qgsprocessingcontext.sip
+++ b/python/core/processing/qgsprocessingcontext.sip
@@ -37,6 +37,7 @@ class QgsProcessingContext
  Constructor for QgsProcessingContext.
 %End
 
+//     QgsProcessingContext &operator=( const QgsProcessingContext &other ) = delete;
     QgsProcessingContext::Flags flags() const;
 %Docstring
  Returns any flags set in the context.
@@ -74,6 +75,9 @@ class QgsProcessingContext
  Sets the expression ``context``.
 %End
 
+
+
+
     QgsFeatureRequest::InvalidGeometryCheck invalidGeometryCheck() const;
 %Docstring
  Returns the behavior used for checking invalid geometries in input layers.
@@ -110,6 +114,8 @@ class QgsProcessingContext
 %End
 
 
+  private:
+    QgsProcessingContext( const QgsProcessingContext &other );
 };
 QFlags<QgsProcessingContext::Flag> operator|(QgsProcessingContext::Flag f1, QFlags<QgsProcessingContext::Flag> f2);
 
diff --git a/src/core/processing/qgsprocessingcontext.h b/src/core/processing/qgsprocessingcontext.h
index 03e411fb7b4..81e8927cb22 100644
--- a/src/core/processing/qgsprocessingcontext.h
+++ b/src/core/processing/qgsprocessingcontext.h
@@ -50,6 +50,9 @@ class CORE_EXPORT QgsProcessingContext
      */
     QgsProcessingContext() = default;
 
+    QgsProcessingContext( const QgsProcessingContext &other ) = delete;
+    QgsProcessingContext &operator=( const QgsProcessingContext &other ) = delete;
+
     /**
      * Returns any flags set in the context.
      * \see setFlags()
@@ -84,6 +87,17 @@ class CORE_EXPORT QgsProcessingContext
      */
     void setExpressionContext( const QgsExpressionContext &context ) { mExpressionContext = context; }
 
+///@cond NOT_STABLE_API
+
+    /**
+     * Returns a reference to the project used for storing temporary layers during
+     * algorithm execution.
+     * \note not available in Python bindings
+     */
+    SIP_SKIP QgsProject &temporaryLayerStore() { return tempProject; }
+
+///@endcond
+
     /**
      * Returns the behavior used for checking invalid geometries in input layers.
      * \see setInvalidGeometryCheck()
@@ -135,10 +149,15 @@ class CORE_EXPORT QgsProcessingContext
 
     QgsProcessingContext::Flags mFlags = 0;
     QPointer< QgsProject > mProject;
+    //! Temporary project owned by the context, used for storing temporarily loaded map layers
+    QgsProject tempProject;
     QgsExpressionContext mExpressionContext;
     QgsFeatureRequest::InvalidGeometryCheck mInvalidGeometryCheck = QgsFeatureRequest::GeometryNoCheck;
     std::function< void( const QgsFeature & ) > mInvalidGeometryCallback;
 
+#ifdef SIP_RUN
+    QgsProcessingContext( const QgsProcessingContext &other );
+#endif
 };
 Q_DECLARE_OPERATORS_FOR_FLAGS( QgsProcessingContext::Flags )