London based Copywriter

Hi there, We've got a client who needs a little help writing something up for each of the services they offer. Essentially what we're looking for is someone to spend a day in their offices and meeting with a number of their employees to help them verbalize their roles, all of which will go onto the new website. Are you able to offer this kind of service? If so what cost would we be looking at for the day? (They're based not too far from Aldgate). Please come back with your experience and a link to your website. Thanks.