TO COMMEMORATE the 30th anniversary of Beatlemania - the term was coined in newspapers the day after the Beatles' appearance on Sunday Night at the London Palladium on 13 October 1963 - London Walks is running two new walking tours of Beatles sites in the city. The walks will take place every Sunday at 11am from Tottenham Court Road Underground station and every Wednesday at 2pm from Baker Street station. Cost is pounds 4 for adults, pounds 3 students.