The progress of the Welsh Tories is apparently being held up as an example to the rest of the party. ‘Look what they’ve achieved in Wales’, the argument runs- 'surely the rest of us can learn from that?' But it goes no further than that.
The support of the central party for Bourne's stance on Wales is at best lukewarm. Given several opportunities to say that he supports his party's leader in Wales, Cameron has studiously failed either to back him, or to slap down those who take the opposite view, such as David Davies. I think we can take it that Bourne's views are just that - his own. Tolerated as long as it helps to win a few seats in the Assembly, but never to become party policy. Come the parliamentary election, we can expect the Tory party in Wales to revert to its usual form.
According to the Western Mail, 10 of the party’s group in the Assembly are 'broadly' in favour of his pro-devolution stance; but ‘broadly’ seems to leave considerable room for doubt as to the extent of their enthusiasm. Coupled with a lack of outstanding talent in the Assembly group, it's probably enough to leave Bourne unchallenged as leader for the time being, but the conspicuous lack of support from the English party will hardly be giving him confidence for the long term. And whether the Welsh Tories' position in the Assembly would survive a change of leadership must remain an open question.
In the meantime, as Ordovicius points out, it looks as though they want to fight their parliamentary campaign on the basis of an irrelevance, which comes, in their own words, no higher than 1002nd in the list of matters of importance, even to rural communities.