never
Poland has never won the World Cup or the European Championships.
1
They have never won it.
The the NL has won the all-stars game 41 times and the AL has won 35 times
Yes, The Netherlands have won Eurovision 4 times.
Poland has never won the Eurovision song contest, they were runners-up in 1994 though.
Portugal have never won the Eurovision Song Contest, up to and including the 2011 contest.
The United Kingdom has hosted Eurovision 8 times. However, the country has won Eurovision 5 times.
Katrina and the Waves won for the UK in 1997
3 times: 1985, 1995, 2009.
Only once, in 2007
Twice: in 1964 and 1990.
Portugal has never won the Eurovision Song Contest
Ireland won it three times in a row, in 1992, 1993 and 1994. They have won it seven times in total.
The United Kingdom have won Eurovision 5 times: 1967 - Sandie Shaw 1969 - Lulu 1976 - Brotherhood of Man 1981 - Bucks fizz 1997 - Katrina and the Waves
Yes. They have won 7 times. See the related question below.