From companies to policymakers, Irish fret over Brexit risks

* Uncertainty is biggest enemy for Irish business, finance

* Ireland has most to lose from any British EU exit

* UK is Ireland's largest and nearest trade partner

* Exporters fear Britons may cut spending after Brexit vote

* Doubts also grow over energy, residency, Northern Ireland

By Padraic Halpin

KILMACANOGE, Ireland, May 12 (Reuters) - Irish perfumier David Cox is preparing for a sales drive across the sea in Britain, but fears that if the country votes to leave the European Union next month the expansion will be thrown into disarray.

From small exporters like Cox to the central bank, Ireland is finding that uncertainty is the biggest enemy in trying to anticipate the consequences of a British exit or "Brexit".

Cox, whose Fragrances of Ireland business operates from a bustling warehouse south of Dublin, says any blow to the confidence of the British gift shop owners he supplies and their customers will frustrate his plans.

"For a small company like us, we need people to be willing to take a chance and that requires them to be confident that the end consumer has got 20, 30, 40 pounds in his or her pocket to spend on something new. If they're worried, they won't."

Ireland has the EU's fastest growing economy but also more to lose than any other member state when its nearest and largest trading partner decides in a referendum on June 23 whether to quit the union that both countries joined together 43 years ago.

Brexit, which Prime Minister Enda Kenny has called "a major strategic risk" to Ireland, could have far-reaching implications not only for trade and an economy still recovering from a banking collapse in 2008-09.

Peace in British-ruled Northern Ireland, security of energy supplies and freedom of movement for the large numbers of Irish citizens working in Britain might also fall into doubt.

Ireland may not spring to mind as a perfumer producer. But Fragrances of Ireland - like so many firms in a country of only 4.5 million people - has built up its business in export markets from its base in the small County Wicklow town of Kilmacanoge.

Seventy percent of sales are in the United States, compared with only 10 percent in Britain. But Cox aims to raise the number of small, independent British retailers that his firm supplies from 150 to 1,000 within the next two years.

Two years is also the period laid down in the EU's Lisbon Treaty for any country to negotiate an EU withdrawal.

No one knows what relationship Britain might hammer out with the EU should it leave, and Cox fears the country's economy and consumer sentiment will weaken during such a period. This would make it tough for his business to establish its name alongside global rivals such as L'Oreal and Estee Lauder.