Television in Scotland 4, and Channel 5, whose broadcast coverage is more limited, and in very remote areas difficult or impossible to receive. Scotland has its own BBC Scotland services, BBC One Scotland and BBC Two Scotland, which commenced broadcasting on 14 March 1952 and 20 April 1964 respectively. Much of the output of BBC Scotland Television, such as news and current affairs programmes, and the Glasgow-based soap opera, "River City", are intended for broadcast within Scotland, whilst others, such as drama and comedy programmes, aim at audiences throughout the UK and further afield. Sports coverage also differs, reflecting the fact that the
Geography of Scotland in the Middle Ages burghs, the late Middle Ages saw the proliferation of baronial and ecclesiastical burghs; 51 were created between 1450 and 1516. Most were much smaller than their royal counterparts, and excluded from international trade they acted mainly as local markets and centres of craftsmanship. There are almost no written sources from which to re-construct the demography of early medieval Scotland. Estimates have been made of a population of 10,000 inhabitants in Dál Riata and 80–100,000 for Pictland, which was probably the largest region. It is likely that the fifth and sixth centuries saw higher mortality rates owing to the appearance of