Probably not... At least here in the U.S., (I would expect the same results in the U.K.) Foxgloves are a semi-difficult plant to grow. Most varities are biennial... meaning they don't produce flowers the first year but bloom the following year and then, most likely die out. They are not usually cultivated by florists since they don't produce much in the way of blooms. They self seed, by the way.
I've grown them and continue to do so but they aren't very long lasting once cut. There are some perrenial varieties, but I have no experience with those...