Ditto WRFU. All the refs at the Geneva International 7s in 2015, came from the WRFU.You are welcome. I know the SRU send coaches, referees and former players, Mossy and Al Kellock to name two, to help out a couple of times a year to various Unions, I think the RFU does the same.
Also, I know of two players playing in the Edinburgh and District league 6th/7th level of Scottish rugby, that are playing for Poland and either Latvia or Lithuania.
Their wives also thoroughly enjoyed the all-expenses (complete with excursions and, God, the amount of booze) paid trip to GVA for a long weekend.