DrFilth,
I live in Tameside too so I know the stranglehold Labour have on the borough. Voters are put off voting Labour as well, because a Labour person always gets elected.
Your example you posted, Labour are still getting elected, but UKiP are now in second where the Conservatives were. They are taking most of their votes from Conservatives.
Manchester is not a UKiP target, and they are unlikely to get any joy at the General Election up here. They do better in the South mopping up disaffected Tories.