To be fair, on the western edge of the amber warning here we had 24.0mm of rain yesterday and it is hammering down again now with similar totals expected today looking at the radar (this is all on top of the 20mm that fell on Friday). Watching the radar yesterday there seemed to be localised heavier areas within the main band that seemed to linger in individual places, maybe justifying the amber. I think though it should have been extended further east as it looks like places east of the amber warning area did get a deluge aswell.
Just as a side note, has anyone else been unable to open the further details tab on the amber warning? I've not been able to for this whole event.