Covid-19 variant may already be in Britain.Health Secretary Sajid Javid said the Omicron strain, which has an unprecedented 32 mutations, may already have arrived from southern Africa after Belgium said it had a confirmed case.The World Health Organisation warned evidence suggests the variant has an increased risk of re-infection and may spread more rapidly.But despite previous reports, it appears the new strain may not be as resistant to vaccines as first feared.The UK yesterday banned flights from six southern Africa countries, as experts fear festive restrictions may be required to tackle the spread of the variant, which was named Omicron by the World Health Organisation.But it's feared the variant may already be here after it emerged.