Dorothy Perkins - Extra 20% off sale items + Flat shipping to Australia!
They have a very large, heavily discounted sale section and for a limited time only, an extra 20% off sale items is applied at checkout (so it's 20% off the already discounted price).
They ship to Australia, and the rate is a flat 10.50 pounds (approx $16 AUD) no matter how large the order.
From when I lived in the UK, I found that DP sizing tended to run a bit large on their own branded items - similar to Sussan in Australia for example, or Target women. However, with their concession brands (ie other brands, not DP branded) I'm not sure about the sizing - it's always helpful to read the reviews on each item as people usually give you some tips re the fit of the item.