diff --git a/CONTRIBUTORS.md b/CONTRIBUTORS.md
index 87b192a11..7b90f68a6 100644
--- a/CONTRIBUTORS.md
+++ b/CONTRIBUTORS.md
@@ -34,3 +34,5 @@
 | ukmo-juan-castillo  | Juan M. Castillo    | Met Office            | 2026-03-24 |
 | mcdalvi          | Mohit Dalvi            | Met Office            | 2026-06-19 |
 | cjohnson-pi      | Christine Johnson      | Met Office            | 2026-06-29 |
+| mo-claudiosanchez | Claudio Sanchez      | Met Office            | 2026-07-23 |
+
diff --git a/mesh_tools/source/support/gen_planar_mod.F90 b/mesh_tools/source/support/gen_planar_mod.F90
index b40befc7c..0d4fc2ba5 100644
--- a/mesh_tools/source/support/gen_planar_mod.F90
+++ b/mesh_tools/source/support/gen_planar_mod.F90
@@ -404,8 +404,8 @@ function gen_planar_constructor( reference_element,          &
   write(rchar_y, '(F10.2)') domain_size(2)
   write(domain_size_str, '(A)') '['//trim(adjustl(rchar_x))// &
                                 ','//trim(adjustl(rchar_y))//']'
-  write(rchar_x, '(F10.2)') domain_centre(1)
-  write(rchar_y, '(F10.2)') domain_centre(2)
+  write(rchar_x, '(F10.6)') domain_centre(1)
+  write(rchar_y, '(F10.6)') domain_centre(2)
   write(domain_centre_str, '(A)') '['//trim(adjustl(rchar_x))// &
                                   ','//trim(adjustl(rchar_y))//']'
 
diff --git a/mesh_tools/unit-test/gen_planar_mod_test_cartesian.pf b/mesh_tools/unit-test/gen_planar_mod_test_cartesian.pf
index 1a293ae80..7c34d32e5 100644
--- a/mesh_tools/unit-test/gen_planar_mod_test_cartesian.pf
+++ b/mesh_tools/unit-test/gen_planar_mod_test_cartesian.pf
@@ -1316,8 +1316,8 @@ contains
                                   trim(adjustl(x_str))//','// &
                                   trim(adjustl(y_str))//']'
 
-    write(x_str, '(F10.2)') context%domain_centre(1)
-    write(y_str, '(F10.2)') context%domain_centre(2)
+    write(x_str, '(F10.6)') context%domain_centre(1)
+    write(y_str, '(F10.6)') context%domain_centre(2)
     write(domain_centre_str, '(A)') ';domain_centre=['//        &
                                     trim(adjustl(x_str))//','// &
                                     trim(adjustl(y_str))//']'
diff --git a/mesh_tools/unit-test/gen_planar_mod_test_spherical.pf b/mesh_tools/unit-test/gen_planar_mod_test_spherical.pf
index 8142d04bf..a3d000b5a 100644
--- a/mesh_tools/unit-test/gen_planar_mod_test_spherical.pf
+++ b/mesh_tools/unit-test/gen_planar_mod_test_spherical.pf
@@ -363,8 +363,8 @@ contains
                                   trim(adjustl(x_str))//','// &
                                   trim(adjustl(y_str))//']'
 
-    write(x_str, '(F10.2)') context%domain_centre(1)
-    write(y_str, '(F10.2)') context%domain_centre(2)
+    write(x_str, '(F10.6)') context%domain_centre(1)
+    write(y_str, '(F10.6)') context%domain_centre(2)
     write(domain_centre_str, '(A)') ';domain_centre=['//        &
                                     trim(adjustl(x_str))//','// &
                                     trim(adjustl(y_str))//']'