This from the Viceroy...
Despite the fact that Tile Hill is many miles beyond Northampton in the direction of Birmingham, this silly information relating to the 10.54 departure appears whenever a service is formed of trains that start off from Euston with eight cars before dividing at Northampton with the first 4 only going forward to Birmingham.
The staff at Tile Hill tell me they have complained to management but nothing has been done to stop this happening.
Similar nonsense appears at other stations, too, between Northampton and Birmingham.