you could try Team Falchion (Derby) http://www.falchion.org
/ or The Dogs of War (Nottingham) http://www.the-dogs-of-war.com/
but bear in mind that most shows/events will be outside the Derby area - both groups were with us at Edwinstowe last bank holiday, but many events are much further afield. for example we're based in Boston but attend events as far apart as London, South Wales, Gloucester & Cheshire to name but a few, so you need to be prepared to travel somehow if you're to attend many events i'm afraid.
best of luck