diff --git a/src/OpenFOAM/db/error/messageStream.C b/src/OpenFOAM/db/error/messageStream.C
index 4511a4bafa..55d3db1b22 100644
--- a/src/OpenFOAM/db/error/messageStream.C
+++ b/src/OpenFOAM/db/error/messageStream.C
@@ -6,7 +6,7 @@
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
     Copyright (C) 2011-2016 OpenFOAM Foundation
-    Copyright (C) 2017-2022 OpenCFD Ltd.
+    Copyright (C) 2017-2023 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -31,6 +31,7 @@ Note
 
 #include "error.H"
 #include "dictionary.H"
+#include "foamVersion.H"
 #include "Pstream.H"
 
 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
@@ -167,7 +168,7 @@ std::ostream& Foam::messageStream::stdStream()
 
 Foam::OSstream& Foam::messageStream::operator()
 (
-    const string& functionName
+    const std::string& functionName
 )
 {
     OSstream& os = this->stream();
@@ -182,6 +183,57 @@ Foam::OSstream& Foam::messageStream::operator()
 }
 
 
+Foam::OSstream& Foam::messageStream::deprecated
+(
+    const int afterVersion,
+    const char* functionName,
+    const char* sourceFileName,
+    const int sourceFileLineNumber
+)
+{
+    OSstream& os = this->stream();
+
+    // No warning for 0 (unversioned) or -ve values (silent versioning).
+    // Also no warning for (version >= foamVersion::api), which
+    // can be used to denote future expiry dates of transition features.
+
+    if (afterVersion > 0 && afterVersion < foamVersion::api)
+    {
+        const int months =
+        (
+            // YYMM -> months
+            (12 * (foamVersion::api/100) + (foamVersion::api % 100))
+          - (12 * (afterVersion/100)  + (afterVersion % 100))
+        );
+
+        os  << nl
+            << ">>> DEPRECATED after version " << afterVersion;
+
+        if (afterVersion < 1000)
+        {
+            // Predates YYMM versioning (eg, 240 for version 2.4)
+            os  << ". This is very old! <<<" << nl;
+        }
+        else
+        {
+            os  << ". This is about " << months << " months old. <<<" << nl;
+        }
+    }
+
+    os  << nl;
+
+    if (functionName)  // nullptr check
+    {
+        os  << "    From " << functionName << nl
+            << "    in file " << sourceFileName
+            << " at line " << sourceFileLineNumber << nl;
+    }
+    os  << "    ";
+
+    return os;
+}
+
+
 Foam::OSstream& Foam::messageStream::operator()
 (
     const char* functionName,
@@ -194,7 +246,7 @@ Foam::OSstream& Foam::messageStream::operator()
     os  << nl
         << "    From " << functionName << nl
         << "    in file " << sourceFileName
-        << " at line " << sourceFileLineNumber << endl
+        << " at line " << sourceFileLineNumber << nl
         << "    ";
 
     return os;
@@ -203,7 +255,7 @@ Foam::OSstream& Foam::messageStream::operator()
 
 Foam::OSstream& Foam::messageStream::operator()
 (
-    const string& functionName,
+    const std::string& functionName,
     const char* sourceFileName,
     const int sourceFileLineNumber
 )
@@ -222,7 +274,7 @@ Foam::OSstream& Foam::messageStream::operator()
     const char* functionName,
     const char* sourceFileName,
     const int sourceFileLineNumber,
-    const string& ioFileName,
+    const std::string& ioFileName,
     const label ioStartLineNumber,
     const label ioEndLineNumber
 )
@@ -233,7 +285,7 @@ Foam::OSstream& Foam::messageStream::operator()
         << "    From " << functionName << nl
         << "    in file " << sourceFileName
         << " at line " << sourceFileLineNumber << nl
-        << "    Reading " << ioFileName;
+        << "    Reading \"" << ioFileName.c_str() << '"';
 
     if (ioStartLineNumber >= 0)
     {
diff --git a/src/OpenFOAM/db/error/messageStream.H b/src/OpenFOAM/db/error/messageStream.H
index c4f23fcd35..be382ec536 100644
--- a/src/OpenFOAM/db/error/messageStream.H
+++ b/src/OpenFOAM/db/error/messageStream.H
@@ -6,7 +6,7 @@
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
     Copyright (C) 2011-2016 OpenFOAM Foundation
-    Copyright (C) 2016-2021 OpenCFD Ltd.
+    Copyright (C) 2016-2023 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -54,7 +54,8 @@ SourceFiles
 #define Foam_messageStream_H
 
 #include "label.H"
-#include "string.H"
+#include "word.H"
+#include <string>
 #include <iostream>
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
@@ -170,6 +171,17 @@ public:
         //- Return std::ostream for output operations.
         std::ostream& stdStream();
 
+        //- Report deprecation (after specified API version) with
+        //- 'From function-name, source file, line number'.
+        //  \return OSstream for further operations
+        OSstream& deprecated
+        (
+            const int afterVersion,
+            const char* functionName,
+            const char* sourceFileName,
+            const int sourceFileLineNumber = 0
+        );
+
         //- Implicit cast to OSstream for << operations
         operator OSstream&()
         {
@@ -186,11 +198,10 @@ public:
         //  \return OSstream for further operations
         OSstream& operator()
         (
-            const string& functionName
+            const std::string& functionName
         );
 
         //- Report 'From function-name, source file, line number'
-        //- Print basic message
         //  \return OSstream for further operations
         OSstream& operator()
         (
@@ -203,7 +214,7 @@ public:
         //  \return OSstream for further operations
         OSstream& operator()
         (
-            const string& functionName,
+            const std::string& functionName,
             const char* sourceFileName,
             const int sourceFileLineNumber = 0
         );
@@ -216,7 +227,7 @@ public:
             const char* functionName,
             const char* sourceFileName,
             const int sourceFileLineNumber,
-            const string& ioFileName,
+            const std::string& ioFileName,
             const label ioStartLineNumber = -1,
             const label ioEndLineNumber = -1
         );
@@ -328,6 +339,11 @@ extern messageStream SeriousError;
 //  for FUNCTION_NAME in file __FILE__ at line __LINE__
 #define WarningInFunction WarningIn(FUNCTION_NAME)
 
+//- Report a warning using Foam::Warning
+//  for FUNCTION_NAME in file __FILE__ at line __LINE__
+#define DeprecatedInFunction(afterVersion)                                     \
+    ::Foam::Warning.deprecated(afterVersion, FUNCTION_NAME, __FILE__, __LINE__)
+
 
 //- Report an IO warning using Foam::Warning
 //  for functionName in file __FILE__ at line __LINE__
diff --git a/src/finiteVolume/expressions/fields/fvPatchFields/exprFixedValueFvPatchField.C b/src/finiteVolume/expressions/fields/fvPatchFields/exprFixedValueFvPatchField.C
index eabf883256..fcf136ecbd 100644
--- a/src/finiteVolume/expressions/fields/fvPatchFields/exprFixedValueFvPatchField.C
+++ b/src/finiteVolume/expressions/fields/fvPatchFields/exprFixedValueFvPatchField.C
@@ -107,6 +107,10 @@ Foam::exprFixedValueFvPatchField<Type>::exprFixedValueFvPatchField
     ),
     driver_(this->patch(), dict_)
 {
+    DeprecatedInFunction(2212)
+        << "Use uniformFixedValue with an expression Function1 instead." << nl
+        << "    This boundary condition will be removed in the future" << endl;
+
     setDebug();
     DebugInFunction << nl;
 
diff --git a/src/genericPatchFields/genericPatchFieldBase/genericPatchFieldBase.C b/src/genericPatchFields/genericPatchFieldBase/genericPatchFieldBase.C
index ae032898ae..b5bd0c839e 100644
--- a/src/genericPatchFields/genericPatchFieldBase/genericPatchFieldBase.C
+++ b/src/genericPatchFields/genericPatchFieldBase/genericPatchFieldBase.C
@@ -26,7 +26,7 @@ License
 \*---------------------------------------------------------------------------*/
 
 #include "genericPatchFieldBase.H"
-#include "messageStream.H"
+#include "error.H"
 
 // * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //