Well the BNP/UKIP link seems to be well established.
As candidates names are not listed until after they've all committed
(You don't know if someone from a particular party is even standing
until after the details are published) it seems obvious that there's
some collusion there, even if it's only a chat down the pub between
like minded bigots...
UKIP and the Tories is something else.
Most Eurosceptic Tories wear their views on their sleeves. I imagine
it wouldn't be hard for UKIP to find out which are their friends,
except that I know of two Eurosceptic Tory county councilors who are
fighting a UKIP challenger...
So, it seems, there may be more going on than meets the eye, but I
really don't know.
Of course it's quite possible that Farage's boys aren't actually that
well organised as they don't actually seem to have any sort of proper
organisation, especially when it comes to doing basic stuff like
proof reading leaflets for simple typographical and grammatical
errors.
They may just be stumbling around in the dark with the BNP,
experienced players that they are, dodging out of the way and the
poor hapless Tories getting caught in the UKIP wringer no matter if
they're Eurosceptic or not.