I See Glimmers.........
'Rutes' contain cyanoglucosides that metabolise to thiocyanate which inhibits thyroid iodide transport which may lead to hypothyroidism and possibly cretinism (not sure about the visual halucinations). Slap some bacon on them neeps and you should be alright. Not sure what to do about the Welsh problem but slap some bacon on that too and I'm sure it will all work out alright eventually.
And maybe have some peas.