I would like to ask you some advice, please. We have two people from non EU countries, who came to work with us on a business visa for 6 months (unpaid jobs). They visa will expire shortly, but they want to stay longer to look at the UK.
If they overstay 2 or 3 weeks, will I have problems with the Home Office, because I wrote business letter of invitation for them???
I am telling them that they won't be able to come back to GB again if they break the law, although they do not want to listen.
Could you possibly give me some advices???
Thanks alot in advance

P.S. Thank you All for your advices. These people are allowed to work, because it is exchange skills and expirienses between different countries and we got permition from British Goverment.