Aiuchi Nationals are on the 17th and 18th November, at Alexander Sports Centre, Sidney Road, Bedford, MK40 2BQ, this year.
Every member of every Aiuchi club is invited, no matter what level. It's two days of training, taught by some of the most senior Dan's in the Association, plus a big party on Saturday evening. (If you aren't available for the whole thing, you can mix and match training/socialising and just come to the bits you can make.)
Keith has put together a document packed full of info (training times, Sat evening social plans, local hotels, parking, bad jokes etc.). See https://goo.gl/M5arRq and ask your instructor what your club's plans for attending are.