https://www.visa4uk.fco.gov.uk/AppProcess/s_VisaRequirements.aspx?check=true

It says:

Visitor In Transit (VIT)
Visa nationals whose ticketing requires them to change airports in the UK and where the connecting flight is less than 48hrs between arrival and departure should select this visa.

Contrary to its title "visitor in transit" you may NOT visit the UK, this visa is solely for the purpose of changing airports i.e. London Heathrow to London Gatwick. Sightseeing, shopping, visiting friends and/or family is prohibited.



Ke garne holaa ta??