Burton Upon Trent is not appearing on your maps until you are zoomed into the area map  , whereas other major towns appear on your maps of the region. Burton upon Trent has a population of over 80,000 and is recognised as the second largest town in Staffordshire ( after Stoke on Trent). It is much larger  than Lichfield ( population 35,000) which appears on your maps as if it were a larger population than Burton. This is a serious error which needs correcting on your maps.