Year 6 pupils from Ysgol Gynradd Aberdale 1st December 2006, 12:00am Tes Editorial (Photograph) - Year 6 pupils from Ysgol Gynradd Aberdale, a Welsh-medium school in Aberdale, Mid-Glamorgan, visited Harlech castle during a three-day trip to Plas Tan y Snowdonia National Park. Photograph: Colin McPherson