speaking of antiques, this is my favourite shop. it is full of the most wonderful english and french antiques.
granted, most of it is stonkingly expensive but it's a lovely space to browse. the staff are really friendly and there is always something little and lovely you can take away for less than £30. they have a really high turnover of stock and, if you're looking for a particular piece of furniture, they will contact you when relevant things come in. definitely the best reason to visit tetbury. that and the amazing pub, trouble house.
you can also shop online - http://www.sharlandandlewis.com/