A very good thing about Bury black pudding [...] is that it's much lower in fat than many other examples, though you wouldn't know it.

For them as needs to know: the only British source of gluten-free black pudding I know of is the butcher in the high street in Haddington, who makes his own and only sells it through his own shop. Most morcilla is gluten-free but's going to be out post-Brexit.