Imogen, Lisa and Nikki with an outside possibility of Mikey as well

Yep....I'm certain Imogen, Nikki and Lisa will be up.

Betdirect and Betfair both say so although Mikey's odds have fallen a bit in the last half hour

I'll have a hard time deciding between Imogen and Lisa I think.

And therein lies a problem - if enough people feel like you then their vote will be split and Nikki will go.
The answer is for everyone who wants to keep Nikki in to vote for both Lisa and Imogen.

Why Imogen? I would have said Mikey and Lisa. Mikey for winding Nikki up and Lisa....well, who wouldn't?