There are a number of other constituencies that differentiate the #TacticalVoting WWW sites and show which ones are *just* about the CUP *losing*, which gets us within reaching distance of someone other than the CUP being H.M. Opposition after this this #UKGeneralElection, & which ones have different agendas to that.
Best for Britain is definitely the latter, about maximizing the LCP rather than minimizing the CUP; about who is going to be H.M. Govt, rather than H.M. Opposition.