To begin with that meant the two moderate parties that had backed the peace process : the ulster unionist party and the social democratic and labour party .
首先那意味着两大温和党北爱尔兰统一党和社会民主及劳工党现已支持和平进程。
The ulster unionist party voted against the measure , despite an unexpected intervention from george bush , who telephoned david cameron , leader of britain 's conservative party , to urge him to press the uup to back the plan .
Second , the dup refused to back the strategy , which left david trimble , leader of the more moderate ulster unionist party ( uup ) , vulnerable to an erosion of support to mr paisley 's party precisely because of that mistrust .