It's called soapboxing.
Hey, I am breaking my journey for a day in Rome, to see rome for like 24 hours and then flying to delhi, so on travelup just go to flights booking and select multi-city, try the dates for london to rome, rome to delhi and then just a return from delhi to london, the dates are in my screenshot. Maybe the prices have changed now, haven't checked after I booked. Hope it helps :)
Cheapest is £313 pp!
Can't see the 7:25am flight ? I chose the same options as you OP but can't see anything?
£277 on Skyscanner now. Good price but less than a week in India is really not enough time to see Delhi or any other part of India.