Actually Sportscraft has lots of good dresses.
This one has a flattering A line skirt (not too festive a colour, but linen is good on a hot day):
I love these dots and the neckine looks quite wide – which is flattering:
This reminds me of a “house dress” that all the mums used to wear when I was a kid. I could be Mrs Brady: This one is a different take on the striped dress: