You’ll need to provide the following:
the dates you’re planning to travel to the UK
details of where you’ll be staying during your visit
how much you think your trip will cost
your current home address and how long you’ve lived there
your parents’ names and dates of birth
how much you earn in a year
You might also need:
details of your travel history for the past 10 years (as shown in your passport)
your employer’s address and telephone number
your partner’s name, date of birth, and passport number
the name and address of anyone paying for your trip
the name, address and passport number of any family members you have in the UK
details of any criminal, civil or immigration offences you have committed