Smell from manhole in garden

[Fly]

A few weeks ago we were visited by a man who wanted to do something to the manhole in our garden due to the neighbours having a blocked toilet. We have since had a sewer smell from the manhole. The paving around is cracked but has been for a while. What needs doing to get rid of the smell? Does the manhole cover need replacing, the paving need relaying or something else?

[singalto]

Have you got a shared drain? If yes, Thames Water deals with the problem..

[Fly]

Thank you

[steveo]

And it should be free

[Fly]

Thames water came and said their manhole is ok. However paving surrounding it has a crack. Hosing into the crack goes straight into the depths of the sewers. They suggest repaying the garden but I can't see how this can be any more than cosmetic. Surely the sewer gases can get through pretty paving too. Any suggestions?