Image copyright Ni water Image caption 'Winnie the Pooh' soft toy recovered from the sewer

Bikes, a family of frogs and a six-foot Christmas tree. No, it's not an obscure verse from the Sound of Music.

These items have all actually been recovered from the Northern Ireland water drainage system.

NI Water have revealed the list after they had to remove a large "fatberg" from Belfast city centre.

Media playback is unsupported on your device Media caption Staff clear the fatberg from under the Dublin Road

And they are urging people in Northern Ireland to be responsible and not flush inappropriate items down the toilet.

Unusual items found in NI sewers

Traffic cones

A kitten found alive in Ballyclare Wastewater Treatment Works

A scooter

Toy cars

A six-foot Christmas tree

Bikes and prams

A golf bag

A school bell - approximately one-foot-high

A family of frogs feeding on the fats, oil and grease

Fire extinguishers

Barbie dolls

Image copyright Ni water Image caption A school bell was one of the items found in the sewer system

£5m spent clearing blockages

In the last two years, NI Water has spent more than £5m clearing blockages from the sewer system.

Almost 80% of these blockages were caused by fat, oil and grease (FOG) and inappropriate items.

'Entire car engine'

Gavin McCready, Networks sewerage manager, said: "You find people put all sorts of things into manholes. Christmas trees, washing lines and building material like timber and rubble.

"This can cause significant problems. I remember a fork got trapped in a joint in the pipe. It sounds like a small item but everything started to build up behind it.

"We had another incident in Lisburn where we had to remove an entire car engine from a manhole.

Image copyright Ni water Image caption A baby seat was recovered from a sewer in Antrim

Other items recovered from our drains

A sofa

Car bumpers

Dust bins

Carpets

Baby car seat

Winnie the Pooh

A banister

Bart Simpson

Engine parts

False teeth

Image copyright Ni water Image caption Some of the items flushed down the drain by people

'Serious damage'

Mr McCready continued: "These blockages mean we have to use cameras, jet equipment and sometimes have to dig down to remove these items.

"We do recover a lot of things like mobile phones, which have accidentally fallen out of people's pockets.

Image copyright Ni water Image caption A scooter was just one of the items recovered by NI Water

"But people are deliberately putting large items like bikes and toys into the sewer system and I would urge them not to do it.

"Not only does it cause serious damage, tampering with manhole covers is very dangerous and can lead to serious injuries."