The Opposition leader is travelling to the Hampshire town where the Lib Dems are engaged in a fierce battle to prevent their Tory coalition partners snatching the seat.
Labour is hoping for a good showing in the contest sparked by the resignation in disgrace of ex-cabinet minister Chris Huhne after he admitted dodging a speeding penalty.
But despite recruiting best-selling author and satirist John O'Farrell as its candidate, insiders acknowledge it has no realistic chance of winning on February 28.
Mr Miliband will use his visit in a bid to capitalise on his surprise announcement yesterday that Labour favoured reviving the 10p income tax rate.
More top news
Rain this morning caught many of us out, however more to come as the day goes on.
Australia's first female PM Julia Gillard has told ITV News Wales about sexist barriers in politics and her affinity to her native Wales.
Princess Charlotte will have five godparents - two less than her brother Prince George. This is who the royal couple have chosen.