Complex sentence: The Committee for a Free Britain boasted that it paid the legal costs of groups taking on left-wing councils, and it invited Adolfo Calero, the Nicaraguan Contra leader, to visit Britain.
Split into simpler sentences: The Committee for a Free Britain boasted that it paid the legal costs of groups enganged in legal disputes with Labour-controlled local authorities. The CFB invited Adolfo Calero, the Nicaraguan Contra leader, to visit Britain.