The visit is intended to give Brown the opportunity to learn about "early intervention" work in the city. Championed by Allen these programmes are presented as a way of reducing crime, drugs problems and low skill levels.
Local activists however might have other issues they want to raise with the PM including his support for the ongoing occupation of Iraq, the crackdown on civil liberties pursued by his government, increasingly harsh treatment of immigrants and the expansion of nuclear power.
Brown's predecessor Tony Blair visited Nottingham in January and July 2006 he was greeted by demonstrations on both occasions. On the latter occasion, one protester infiltrated the hall where Blair was speaking and took off his shirt to reveal anti-war messages.
At the moment we don't know for sure that Brown is coming nor when he's likely to do so, but if he does decide to show his face around these parts he ought not to expect his visit to pass of without comment.
Blair visit in January 2006: http://www.indymedia.org.uk/en/regions/nottinghamshire/2006/01/331452.html
Blair visit in July 2006: http://www.indymedia.org.uk/en/regions/nottinghamshire/2006/07/346195.html