If you like the look of the one above, Great Plains has some shirt dresses in the sale this year.
I love this graphic printed one, perfect for this year's monochrome trend and now half price in the sale:
Caligari Shirt Dress £25 from £50
Jenna Checked Shirt Dress £39 from £50
Get Knotted Print Dress £39 from £55
Fluerette Broderie Detail Dress £32.50 from £65