The search for love used to be all about lonely-hearts columns, blind-dates and match-making friends. But now -- if you're single, it's pretty safe to presume you're on a dating app.As part of its Line 18 series, Sky News has been investigating the changing face of the way people look for partners.Sky's Ashish Joshi has been looking into it.Line 18 is a journey through modern Britain in 2018. It runs the length of the UK and it will examine the divides and fractures in society through the voices of those affected, and backed up by data which shines a new light on how Britain is changing.