Published Friday, 26 June 2009
It brings the total to 25, the Department of Health confirmed.
The latest is a man recently returned from the US. He has been given antivirals and is recovering at home.
There are 16 others under investigation.
Another man has been hospitalised with the condition with a chest complaint. He is in a stable condition.
A further 76 confirmed cases elsewhere in the UK took the overall total to 4,323.
These included 72 new cases in Scotland, taking the total to 922, three in Wales, taking the country's total to 12, and another in Northern Ireland, making a total of 25 there.
On Thursday, health officials said they could no longer contain the virus in parts of the UK.
The West Midlands now has a total of 1,516 cases - more than a third of all cases in the UK - while London has 985, more than a fifth of the UK total.
Both hotspots are adopting a policy of outbreak management, meaning new swine flu cases will be clinically diagnosed rather than being confirmed by laboratory results.
The new policy means swabbing will take place only for a small number of cases to keep track of the strength of the virus.
Doctors will also use the drug Tamiflu more selectively, targeting only people with symptoms.
The drug is now unlikely to be handed out to everyone who has come into contact with a swine flu sufferer as a precaution.
'Containment phase'
Chief medical officer Sir Liam Donaldson stressed that many parts of the country were still in the containment phase.
But he warned there could be "tens of thousands of cases" of swine flu each week by the autumn because the virus is more likely to thrive in the colder months.
Sir Liam said: "We still think we are heading for the largest surge of cases in the autumn and winter."
He also pointed to three possible scenarios for the virus as the UK enters winter:
- The virus remains relatively mild;
- It mutates into something more severe;
- It combines with another virus to create another strain.
The Government has signed contracts with GSK and Baxter for the supply of 130 million doses of swine flu vaccine - enough for the entire population.
The first delivery is expected in August and 60 million doses should have been delivered by the end of the year.
The vaccine will also offer protection from swine flu in the years ahead.