Keats

Hi all This weekend I got myself a big shiny telly (very exciting!) - this came with Freeview HD tuner built in, however I can't seem to actually pick up the HD channels. The internet tells me these should be availble (link), but they're just not being picked up by the auto tuner. Does anyone else actually get the HD channels? I'm wondering if it's my block's antenna or if it's actually a wider problem in the area. Thanks