A national day celebrating the country's pockmarked roads is being held on Tuesday. 

On January 15 Britain will come together to celebrate National Pothole Day. 

First conceptualised by Mark Morrell, aka 'Mr Pothole', the day aims to raise awareness about potholes, their causes and what can be done to fix them.

In a bid to join the festivities, we want you to highlight the worst offending potholes in your area. 

Along with photographic evidence, send us submissions detailing the pothole's location and what makes it so noteworthily annoying. 

While you are thinking of the perfect road crater to highlight, read our short rundown of the cause of potholes, what to do if you hit one and how they are fixed. 

What causes potholes?

Potholes are a natural phenomenon.

Caused by by the expansion and contraction of ground water which has entered from underneath the pavement, potholes are hard to prevent.

When water freezes, it expands, causing the pavement to crack and weaken. Over time the cracks expand as the process repeats, weakening the road further.

As the weight of cars passes over the weakened spot in the road, pieces of the road break, creating the infamous pothole.

What should you do if you hit one?

If you are unlucky enough to hit a pothole the first step is obvious - check for damage.

Some damage may not be obvious straight away, so keep an eye out for any vibrations, your steering wheel not centring properly or the car pulling to one side.

The AA advise that if any of these happen you get your car checked by a garage or tyre specialist as soon as possible.

If you intend to make an insurance claim, make sure you properly note the location of the pothole.

Report the pothole to the council, and then make your claim to them.

If they were already aware of the pothole, the council will be obliged to cover the cost incurred in repairing your car.

And how are they repaired?

It's the council's job to repair potholes, but how do they do it?

Potholes are filled using liquid asphalt.

After the crater is cleared of water or debris, the hole is packed with material that can be compacted tightly, such as rocks, clay or crushed concrete.

Now you can pour in the asphalt.

Once the asphalt is pushed down and properly compressed, the hole is covered and left to set.

Job done.