diff --git a/cran.r-project.org/web/checks/check_flavors.html b/cran.r-project.org/web/checks/check_flavors.html
index 8f9ae2b..65b0820 100644
--- a/cran.r-project.org/web/checks/check_flavors.html
+++ b/cran.r-project.org/web/checks/check_flavors.html
@@ -10,7 +10,7 @@
 <div class="container">
 <h2>CRAN Package Check Flavors</h2>
 <p>
-Last updated on 2024-11-22 05:48:57 CET.
+Last updated on 2024-11-26 05:48:34 CET.
 </p>
 <p>
 Systems used for CRAN package checking.
diff --git a/cran.r-project.org/web/checks/check_issue_kinds.html b/cran.r-project.org/web/checks/check_issue_kinds.html
index 85079b6..7690f7b 100644
--- a/cran.r-project.org/web/checks/check_issue_kinds.html
+++ b/cran.r-project.org/web/checks/check_issue_kinds.html
@@ -10,7 +10,7 @@
 <div class="container">
 <h2>CRAN Package Check Issue Kinds</h2>
 <p>
-Last updated on 2024-11-22 05:48:57 CET.
+Last updated on 2024-11-26 05:48:34 CET.
 </p>
 <table border="1">
 <tr> <th> Kind </th> <th> Description </th> <th> Details </th> </tr>
diff --git a/www.stats.ox.ac.uk/pub/bdr/C23/README.txt b/www.stats.ox.ac.uk/pub/bdr/C23/README.txt
index 7da4927..490fa4b 100644
--- a/www.stats.ox.ac.uk/pub/bdr/C23/README.txt
+++ b/www.stats.ox.ac.uk/pub/bdr/C23/README.txt
@@ -1,13 +1,12 @@
 Tests as for fedora-clang but using
 
-CC='clang -std=gnu2x'
+CC='clang -std=gnu23'
+
+(-std=gnu2x for earlier versions of clang).
 
 Other details as
 https://www.stats.ox.ac.uk/pub/bdr/Rconfig/r-devel-linux-x86_64-fedora-clang
 
-[The checks were done with clang 16.0.0rc, but should be reproducible
-with the current clang 15.0.x.]
-
 Details of the upcoming C23 standard can be found at
 
 https://en.cppreference.com/w/c/23
@@ -16,9 +15,11 @@ https://open-std.org/JTC1/SC22/WG14/www/docs/n3054.pdf
 
 Note that 'bool', 'false' and 'true' have become reserved words.
 
-Some of this, including the new reserved words, is also seen with gcc pre-13.
+Some of this, including the new reserved words, is also seen with gcc >= 13.
+
+tth has since had added 
+
+SystemRequirements: USE_C17
+
+to it DESCRIPTION file which ensures compilation with C17.
 
-Becasue mgcv is currently failing, you may not be able to build R with
-this setting of CC -- rather use it in a personal Makevars file when
-checking the package
--- https://cran.r-project.org/doc/manuals/r-devel/R-admin.html#Customizing-package-compilation
diff --git a/www.stats.ox.ac.uk/pub/bdr/Rconfig/r-devel-linux-x86_64-fedora-clang b/www.stats.ox.ac.uk/pub/bdr/Rconfig/r-devel-linux-x86_64-fedora-clang
index ee929ed..2576004 100644
--- a/www.stats.ox.ac.uk/pub/bdr/Rconfig/r-devel-linux-x86_64-fedora-clang
+++ b/www.stats.ox.ac.uk/pub/bdr/Rconfig/r-devel-linux-x86_64-fedora-clang
@@ -1,6 +1,6 @@
 R-devel
 x86_64 Fedora 36 Linux
-clang 19.1.3 (C, C++), flang-new 19.1.3 (Fortran)
+clang 19.1.4 (C, C++), flang-new 19.1.4 (Fortran)
 Timezone Europe/London
 Locale en_GB.UTF-8, LC_COLLATE=C
 
@@ -20,8 +20,8 @@ For soures and some binary distrobutions see
 https://github.com/llvm/llvm-project/releases/
 Built via
 
-tar cf lvmorg-19.1.3/llvm-project-19.1.3.src.tar.xz
-ln -s  llvm-project-19.1.3.src latest
+tar cf lvmorg-19.1.4/llvm-project-19.1.4.src.tar.xz
+ln -s  llvm-project-19.1.4.src latest
 mkdir build
 cd build
 cmake -G "Unix Makefiles" \