I have put on a fair bit of weight over the last year and am currently 11st 7 and only 5ft 3 (about a size 16). I look a bit like this with slightly bigger hips as I am a pear shape 
www.closeronline.co.uk/ShowbizNews/LatestNews/weathergirl-clare-nasir-unflattering-lime-green-bikini-training.aspx
Anyway I am of course now dieting but it is too late so slim down to a size 10 for the party so I need to work with what I have.
It is a garden party (marquee, hog roast etc) at night so I need something warmish but definitely a dress. I bought this but it is too pleated on the waist which is never good for my hips plus it is too short (I prefer knee length)
www.dorothyperkins.com/webapp/wcs/stores/servlet/ProductDisplay?beginIndex=0&viewAllFlag=&catalogId=33053&storeId=12552&productId=1928645&langId=-1&categoryId=&parent_category_rn=
I would like something similar in shape as I think cardies make me look frumpy so sleeveless is out.
I have a nice top half in comparison to my bottom half but being a bit chubby I just need something slimming but still really nice!
Please help! I have a budget of about £80.