Complex sentence: The association ran British Championships in 2001-3, but went into a moribund state following resignations of many of the committee and in late 2004 Trevor Parry took over running the organisation.
Split into simpler sentences: The association ran British Championships in 2001-3, but went into a moribund state following resignations of many of the committee. In late 2004 Trevor Parry took over running the organisation.