There was always a problem in the weather when it used real screens -there was refection from the behind the camera of the map of Northern Ireland so that there was a blue box clearly visible reflecting off the screen in studio.
The sport always appeared to have problems with chromakey and making the VR look as if it was real. They had a podium that seemed to cause no end of problems - it latter months it seems to have fabric laid on top or a more matt finish to avoid reflections.