I agree heavily with this sentiment, with a possible addendum – I imagine it could still be possible to have an issue-based coalition that attempts to lobby parties but is not seen as endorsing any parties specifically. In this sense, you could still attempt to lobby Reform as a single-issue coalition, although this strategy might be more aggressive/ gain less traction than simply tacking onto Your Party which is generally more value-aligned.

This is an interesting point! I agree with Ben that a Conservative-Reform coalition is very possible though, particularly if Reform do anywhere near as well in the next election as they have done in polls thus far. I'd imagine the chances of a hung parliament are currently pretty high.