In case anyone is looking for a total bargain of a summer dress, I’ve picked one up in Lidl of all places.
It’s knee length, linen/cotton mix, sleeveless with buttons down to the waist at the front (so like a shirtdress). I got black but I think there were two or three other options, one floral pattern and one striped.
Not bad for £7.99, I am v happy 