Jackson won the seat at the last general election with the slimmest of majorities – just 42 votes. That makes the north London constituency the most marginal in England.
The Labour firebrand officially retired when parliament dissolved in March, leaving her successor, Tulip Siddiq, to fight for the seat.
But the former local councillor faces stiff competition in the shape of Tory candidate Simon Marcus and, with Labour's proposed "Mansion Tax", the wannabe MP must convince the electorate that the reds are the right pick in the polls.
Elsewhere, former Islamist turned counter-extremist Maajid Nawaz is hoping to put in a good showing for the Liberal Democrats.
Nawaz was once locked up in an Egyptian jail, now he's entered the deep-end of party politics. How will he fair? IBTimes UK visited Hampstead and Kilburn to witness the campaign first-hand.