As I said in another thread I dont have any ideas on what he can do. The Party is more than two factions, there are around four.
There will never be a single party of SNP, liberal, greens and labour. For a start they dont all have the same agenda in the slightest regardless of left or right wing.
At present the Tories are occupying the 'New Labour' position as bought in by 'Call me Dave', continued by May and now Johnson. IMHO we do not have a proper right wing Tory Party any more - you know one that promotes business, cuts spending and boosts the economy with lower taxes. In fact the current regime is doing the total opposite of all of that.