The British seaside remains a popular place for day-trippers. In the old days, you would have spent a week or even a fortnight somewhere on the British coast. But not any more - not with so many cheap flights to the sun available. Yet many of us have fond childhood memories of the seaside. So, is nostalgia for sandcastles, knickerbocker glories and rock pools all part of the continuing appeal? Clare Jenkins has been looking for answers at Beside the Seaside - The Bridlington Experience, a museum devoted to celebrating the British seaside holiday.