thanks all, for links etc.
I sent a recorded letter (which threatened legal action) which got a response (telephone conversation). They don’t dispute they owe me money for the work I did, but have gone cold again and keep stalling and ignoring e-mails again.
They haven’t gone ahead with the project due to the economic state of the country (and theirs I guess) so they haven’t made any money from it, so are trying not to pay me (but it is nearly 3years now and still doesn’t look like they are going to do it, so I said I’ve had enough of waiting). I have a contract that states they still need to pay me regardless of if they did anything or not. In the region of £4,000.
Will send another official sounding letter (recorded) and then look into the SCC.
Cheers