Original sentence: In late 1997 he successfully led the refendum campaign to establish the Welsh Assembly, but the slender majority and poor turnout (resulting in only 1 in 4 voters in Wales actually voting for the Assembly) cast a shadow over the institution's authority
Edited sentence: In late 1997 he successfully led the refendum campaign to establish the Welsh Assembly, but the slender majority and poor turnout (resulting in only 1 in 4 voters in Wales actually voting for the Assembly) cast a shadow over the institution's authority from the outset, a shadow that was only to grow