We employee some short-term contract EEA citizens who come to the UK from their home country for up to 6 weeks to work for us in the UK.  

As they are in the UK for less than 183 days, they are not tax resident in the UK but tax resident in their home country. 

Only some employees have employers in their home country. We do not have any relationships with their employers so they're not seconded employees. 

Do we need to treat these employees differently in Sage 50 Payroll? 

Do we need an additional Sage module?