Complex sentence: While the original inhabitants came to work in the forestry (many of them, ironically, from Hebridean islands where few trees grow) the current population also includes some who have moved to the area from Central Scotland and England.
Split into simpler sentences: While the original inhabitants came to work in the forestry (many of them, ironically, from Hebridean islands where few trees grow). The current population includes some who have moved to the area from Central Scotland and England.