By Katy Winter for MailOnline If investigating London’s vast network of sewers doesn’t sound like your idea of a romantic date, how about doing it search of great globules of fat blocking the drains? As unappealing as that sounds to most of us, one couple celebrated their love under the streets of the capital while on the lookout for ‘fatbergs’. Dan MacIntyre decided to surprise girlfriend Dunya Kalantery with the excursion to mark their one year anniversary. Dan MacIntyre and girlfriend Dunya Kalantery share a tender moment during their one-year anniversary celebrations in London's sewer system The couple discovered their shared interest in greasy globules when a record 15-tonne fatberg was discovered under Kingston last year
@highlight
Dan and Dunya met in 2013 when a fatberg was causing havoc in London
@highlight
Became fascinated by the sewer blockages made of congealed lumps of fat
@highlight
Dan secretly arranged trip to London sewers to mark one-year anniversary
@highlight
Couple had to wear safety gear and overalls for the 40-minute visit
@highlight
Thames Water say this unusual date was a 'one-off'
So Mr MacIntyre secretly wrote to @placeholder with the request to tour the sewers to celebrate their one-year anniversary.
We're very grateful to @placeholder for arranging this trip.