Is it a Public building (eg school/council etc) or a Private company? With a public one its more of a can of worms eg final salary pensions, paid sick, additional service days etc but if its just a simple office you are less likely to come across this sort of thing. Notification Of Employee Liability Information (NELI) is quoted quite a lot and this is effectively what you are asking for. When I first started my company the first thing I looked at was Legal advice services, particularly being in this game! I went with peninsula and they have supported me through the most difficult of TUPE cases