Neighbours damaged my wall over 6 years ago

[Drpepper99]

I didn't know anything about party wall agreements or that you cant build near your neighbours wall or house etc . My neighbours failed to get planning permission didn't give me a PWA and went ahead with work damaging my wall and putting a crack in my path , my house is only a metre or so from the wall and they dug under the wall foundations .
I now know all about the rules and regulations but am I too late to complain I didn't know they were doing anything wrong at the time I thought the cracks were only small and didn't think I could do anything anyway.
Is there any way round this am worried they might have damaged house foundations? House is already underpinned.

I have legal cover but I think its out of date range so where do I stand .

[Celestine]

Limitation Act is 6 years from cause of action, but sometimes can be interpreted as from the point you first became aware of the problem. If building work were carried out 'covertly' leaving you unaware, there may be some flexibility of interpretation.
If the house is already underpinned, it is fairly unlikely they could have done something covertly which would have caused structural damage. When you say 'wall', I'm unsure whether you mean house wall or garden boundary wall?
In any event, if you are seriously concerned, you must instruct a surveyor to undertake a survey; which could then give you a foundation (no pun intended!) to take further action.

[Drpepper99]

They dug out foundations for another wall on the other side of the wall going horizontal, they must of dug below our wall foundations to discover the tunnel going under our house .Thats all I know .We are really close to the wall . I wish I had more knowledge at the time .