Damp cellar floor is it a problem

[Bumpkin]

We've got a Victorian coal hole cellar with a mud floor and after a couple of severe water leaks, I've taken more of an interest in the state of the dampness.  I've been running a dehumidifier for the past couple of weeks following a small water pipe leak and whilst most of the floor is now bone dry, there are damp patches along most of the wall adjoining the next house, a large damp patch in the middle of the floor that will not dry even with the dehumidifier right next to it and a patch of wet mud in a small hollow in the middle of the cellar.  An expert that lent us industrial drying equipment following a flood from a burst mains pipe said there will always be damp, but I'm a bit concerned in case there is a fundamental problem - any ideas from anyone with similar?

[alice]

When I had a property with a basement there would often be a pool of water in the centre. I was told it was related to the fluctuating height of the water table in the area (se22) and would not become a problem and the only way to get rid of it would be to get the whole place completely tanked. 

[Bumpkin]

Thanks Alice, I think that’s probably the same for us