British payments processor Worldpay joined the London Stock Exchange on Tuesday in an initial public offering valuing the company at 4.8 billion pounds ($7.4 billion), the biggest flotation in what had been a lacklustre year for listings in Britain.
Refer to the input text as context and select the correct relationship between 'Worldpay' and 'London' from the available options.
Options: founded by, parent organization, original broadcaster, headquarters location