I find it stranger that he asks for No Ex Police/Teachers/Firemen etc...
John Underwoods Tanks and Farm Supplies UK
John Underwood Tanks and Products
Southerly Park
Binton
Stratford Upon Avon
Warwickshire
CV37 9TU
Yeah why wouldn't you want ex police, school teachers, and firemen? So weird.
It's utterly valid, in my opinion, to want someone who, presumably, speaks specific languages. If all your customers are French, obviously you're going to need someone who speaks French etc...
Did the OP take the photo or is this a repost? Not sure if shopped.
No ex police - He's up to something dodgy and doesn't want them to go running to their mates still in the force.
No teachers, firemen - Doesn't want someone who just want's it as a half arsed side job.
Eastern Europeans - He's realised they're happy to/don't care that he's fiddling the books see point 1, also work harder than Steve from the job centre that just wants his wage to go and handover to his friendly bar staff at the end of each week.
Or he's an anti British, anti establishment, anti not burning to death pleb.
Wow and a conclusion is drawn, it's as easy as that.