You're very welcome - even though it's still a bit difficult to find brightly coloured dresses for summer in the office just yet, I'm glad I found something that caught your eye (especially as I think we probably have quite different taste in general). I'm sure you'll see lots more suitable dresses appearing soon as it's (technically!) almost spring ...??!
Funnily enough, that dress was the only one on the Coast website that I thought was ok ...!! And even then I'd personally much prefer the Reiss & Ghost offerings I posted to the Coast one, so I'm with @Ophir on that!! I think Coast was once ok back in my early work days in the 90s - quite good for evenings & formal events - but they've become too dated & ridiculously expensive for what are 99.9% shiny synthetics!
However, I know the Coast website now stocks a billion other brands, as it's owned by Boohoo aka the Debenhams group (along with Karen Millen, Oasis, Warehouse, Wallis & other former staples of the UK high street that went under). To avoid being overwhelmed I had just filtered for Coast itself - & then looked at the other petite ranges it listed, like KM, on their own websites. So I think it's much more likely that the ones you thought were stunning were not actually from Coast ...!
I'm glad you like the denim KM one though - a simple indigo denim dress is a very useful thing.