Chakka is correct and either is or are may be used in these circumstances. Weekly in The Times, a ‘Feedback' column responds to readers' complaints. On March 10th 2007, one had written (abbreviated),,,
"I am writing to highlight the increasing incorrect use of collective nouns with plural verbs...'the team are doing this' or ‘England are doing that'..."
The editor responded...
"Actually it isn't incorrect. To quote Gowers: ‘In using collective words or nouns of multitude (department, government, committee and the like...there is no rule; either a singular or a plural verb may be used.'"
The Gowers referred to was Sir Ernest Gowers, the author of The Complete Plain Words first published in 1954. His words are echoed by those of the editor of Fowler's Modern English Usage, who expresses the selfsame thought as, "In British English, collective nouns may be correctly followed by either a singular or a plural verb."
There ARE circumstances where one might feel only one of these feels right, so simply use that one at the time.