Rigsby, I beleive you are a third party in the so called criminal act.
I recall a job where we was called in to carry out some plastering works in a grade 2 listed property. The contractor was merrily pulling down existing lathe and plaster ceilings , and replacing with new board and skim.All being done to a good standard.The local conservation officer just happened to walk by one day,lookied up into the bedroom window,which was open and witnessed a crime in action.
He approached the home owner and enquired as to what was being done.He later returned that day and issued an enforcement notice.The new ceilings had to come down,and new lathe and lime plaster put in place.Now the works were given a time scale of 3 months to be completed and faliure to comply was a £ 10,000 fine for the home owner and £ 3,000 for the contractor ( third party).Our company carried out the lime plastering works within the time scale and all was good.
My point is, you may be accountable for being involved with a so called illegal job.
I assume you have spoken to a solicitor regarding your position, and am sure you are wise enough not to discuss any legal issues on here in case of incrimination.