Thirteen years and £12 billion – that’s how much time and money it would take to cure the scourge of potholes on our roads.

Where do you think the worst potholes in south-east London and north Kent are? Where are the ones that have been left the longest without being repaired or have caused the most damage?

Tell us in the comments below or better still send us photos of the most offending holes – email us or use the online form here

A new study has revealed one in six roads is in poor condition.

Emergency government funding after last year's wet winter helped drive a 33 per cent increase in pothole repairs, but there has been no reduction in the amount needed to bring the network in England and Wales up to scratch, says the Asphalt Industry Alliance (AIA).

It says £12.16 billion is needed to get the local road network back into "reasonable" condition and the estimated time it would take to clear the backlog of repairs has increased by a year to 13 years.

Alan Mackenzie, chairman of the AIA, said money spent on filling the 2.7 million potholes reported would be better spent preventing potholes forming in the first place.

He said: “The £6 billion of funding pledged between 2015 and 2021 is welcome, and hopefully will be confirmed by an incoming government. But the truth is that although it sounds like a big investment, it will only be enough for local authorities to tread water and it will do nothing to tackle the backlog or prevent continuing deterioration."

Peter Box, transport spokesman at the Local Government Association, said: "It is hugely frustrating yet unsurprising that, despite our best efforts, we have not been able to make a dent in the £12 billion roads repair backlog. Patching up our crumbling road network is simply not the answer to tackle the roads crisis we face as a country.

"Councils need billions, not millions, to bring our roads up to scratch. Every mile of motorways and trunk roads will receive £1.4 million funding over the next six years compared with £31,000 per mile for local roads. This makes little sense given the government's own traffic projections predict an increase in local traffic of more than 40 per cent by 2040."

Professor Stephen Glaister, director of the RAC Foundation, said potholes would remain a top transport priority among voters.

He said: “The extra chunks of cash spent on road maintenance over the last parliament have been welcome but with a record number of cars on the road, rising traffic volume and routine resurfacing work taking place only half as frequently as in the 1980s, this issue is unlikely to slip far down the list of things people want ministers to tackle."

A Department for Transport spokesman said: "Well maintained local roads are vital for our transport network and it is for local councils to maintain them properly. This government has provided over £4.7 billion to councils since 2010, an increase of £1 billion compared to the previous parliament.

"As part of our long term economic plan, we have also committed to spend a further £6 billion between 2015 to 2021 providing councils with the certainty they require to plan how they will keep their roads well maintained."