hi there
there are a number of reasons why clients change suppliers, they include service and price.
when a clients decides to change their cleaners for services, they do on too many occasions expect a new cleaner to turn up and do the work.
ideally when you win a new contract you should point out to the client that TUPE is in place, there are many companies that wont bother with TUPE , their cleaner leaves and so be it
but on most occassions you should ask your client for the TUPE information you then know exactly what you are dealing with and the implications of it.
you need to know the hours they work, length of service, holiday entitlement, holiday taken to date in the current year. also any disciplinary actions to date.
all you can then do is to train the operatives to your way of delivering the service, if they fail to deliver the standard, then you deal with it through your discipline procedures.
good luck
regards
martin