diff --git a/services/dataProcessor.ts b/services/dataProcessor.ts
index 159d2a1..772511a 100644
--- a/services/dataProcessor.ts
+++ b/services/dataProcessor.ts
@@ -2261,11 +2261,11 @@ export const processBuyBoxExcel = async (fileOrBuffer: File | ArrayBuffer): Prom
             }
 
             // Fallback to previous hardcoded indices if header search fails or for specific known sheet structures
-            if (reasonIdx === -1 || (config.country === 'FR' && reasonIdx !== 18)) {
-                if (config.country === 'FR') reasonIdx = 18; // Force Column S for FR
+            if (reasonIdx === -1 || (config.country === 'FR' && reasonIdx !== 18) || (config.country === 'UK' && reasonIdx !== 9)) {
+                if (config.country === 'FR') reasonIdx = 18; // Force Column S for FR (Index 18)
+                else if (config.country === 'UK') reasonIdx = 9; // Force Column J for UK (Index 9)
                 else if (reasonIdx === -1) {
-                    if (config.country === 'UK') reasonIdx = 9;
-                    else if (config.country === 'DE') reasonIdx = 13;
+                    if (config.country === 'DE') reasonIdx = 13;
                     else if (config.country === 'IT') reasonIdx = 12;
                     else if (config.country === 'ES') reasonIdx = 13;
                     else reasonIdx = 13;