Which island is in the United Kingdom?
CREATE TABLE "most_densely_populated_islands_over_1_00" (
  "island" text,
  "country" text,
  "population" text,
  "area_km" text,
  "density_per_km" text
);
SELECT "island" FROM "most_densely_populated_islands_over_1_00" WHERE "country"='united kingdom';