Two new cases of swine flu have been confirmed, taking the UK total to 109, health officials said.
The Department of Health said the new cases involved one adult and one child, both from London.
One was linked to a previously confirmed case while the other was linked to a recently-returned traveller.
Worldwide, swine flu cases has now passed the 10,000 mark as health chiefs continued talks on how best to fight the disease.
The latest World Health Organisation (WHO) figures showed 10,243 people were infected with swine flu, with 80 deaths, mostly in Mexico.
The continued spread of the disease comes as the WHO's 193 member states met in Geneva to discuss treatment and response plans as well as vaccinations to combat the disease.
The WHO's pandemic alert scale remains at phase five, meaning a global flu epidemic is deemed "imminent".
The Foreign Office is no longer advising against travel to Mexico, where the H1N1 flu outbreak started.
On Tuesday, UK holiday companies Thomson and First Choice said they hoped to resume flights to Mexico from Sunday.