Topshop was not closed after staff were diagnosed with swine flu
Two members of staff working in the Oxford Street branch of Topshop have tested positive for swine flu, the Health Protection Agency (HPA) said.
One developed symptoms in early May and did not return to the central London store when tests came back positive, said Arcadia, the owners of Topshop.
The second worker tested positive last week and has had "minimal" contact with other staff and customers.
The store remained open as risk to customers was "minimal", the HPA said.
The two Topshop employees had no contact with each other, an HPA spokeswoman said.
"The store remains open, as the risk to the public and other members of staff was minimal," she said.
Earlier the New West End Company, which represents businesses in Oxford Street, had said it was not aware of any swine flu cases at the store.
A spokeswoman said: "New West End Company is not aware of any new cases of swine flu amongst retail employees in the West End.
"We understand that all stores, in line with public areas across the country, such as shopping centres, schools, colleges and major transport hubs, have procedures in place to implement the guidelines set by the Health Protection Agency."
Eight Year Six children and a teacher from Immanuel and St Andrew Church of England Primary School in Streatham, south London, also tested positive for the flu after a school trip to Surrey.
Two boys from Year Seven in The Hall School in Belsize Park, north London, were also confirmed as having the virus after returning from a school trip to Normandy, the HPA said.
Both schools will remain open despite the cases.
The new cases takes the total number of people in London with the virus to 176, while there are now 1,461 confirmed cases in the UK.