diff --git a/schemas/ispyb/updates/2025_06_27_Tomogram_pixelLocation.sql b/schemas/ispyb/updates/2025_06_27_Tomogram_pixelLocation.sql
new file mode 100644
index 0000000..93bd724
--- /dev/null
+++ b/schemas/ispyb/updates/2025_06_27_Tomogram_pixelLocation.sql
@@ -0,0 +1,6 @@
+INSERT IGNORE INTO SchemaStatus (scriptName, schemaStatus) VALUES ('2025_06_27_Tomogram_pixelLocation.sql', 'ONGOING');
+
+ALTER TABLE ParticleClassification ADD pixelLocationX int COMMENT 'pixel location of tomogram centre on search map image (x)', ALGORITHM=INSTANT;
+ALTER TABLE ParticleClassification ADD pixelLocationY int COMMENT 'pixel location of tomogram centre on search map image (y)', ALGORITHM=INSTANT;
+
+UPDATE SchemaStatus SET schemaStatus = 'DONE' WHERE scriptName = '2025_06_27_Tomogram_pixelLocation.sql';
diff --git a/schemas/ispyb/updates/2025_06_27_undo_ParticleClassification_set_Tomogram_pixelLocation.sql b/schemas/ispyb/updates/2025_06_27_undo_ParticleClassification_set_Tomogram_pixelLocation.sql
new file mode 100644
index 0000000..f4cdfec
--- /dev/null
+++ b/schemas/ispyb/updates/2025_06_27_undo_ParticleClassification_set_Tomogram_pixelLocation.sql
@@ -0,0 +1,9 @@
+INSERT IGNORE INTO SchemaStatus (scriptName, schemaStatus) VALUES ('2025_06_27_undo_ParticleClassification_set_Tomogram_pixelLocation.sql', 'ONGOING');
+
+ALTER TABLE ParticleClassification DROP COLUMN IF EXISTS pixelLocationX;
+ALTER TABLE ParticleClassification DROP COLUMN IF EXISTS pixelLocationY;
+
+ALTER TABLE Tomogram ADD pixelLocationX int COMMENT 'pixel location of tomogram centre on search map image (x)', ALGORITHM=INSTANT;
+ALTER TABLE Tomogram ADD pixelLocationY int COMMENT 'pixel location of tomogram centre on search map image (y)', ALGORITHM=INSTANT;
+
+UPDATE SchemaStatus SET schemaStatus = 'DONE' WHERE scriptName = '2025_06_27_undo_ParticleClassification_set_Tomogram_pixelLocation.sql';