I do buy from uniqlo, but I think it was janeinainsworth who mentioned them before. I buy from all sorts of places, I have no particular favourite but I love real wool and natural products so buy most of my cardigans and jumpers from Woo lovers, they do lovely long-line cardigans in lots of colours and long-line v-necks, these are my slobbing around at home outfits. I love phase eight and Boden dresses, phase eight often have long sleeves. Seasalt, fat face both do lovely tops with long sleeves. I buy long-sleeved t-shirts from sainsbury and almost everything else is bought online from sites like uniqlo. Quite often if I need a particular item I will just Google it - such as a long-sleeved red top for choir or black wool trousers, and I look at the results suggested.