Lane, the main Houses were rearranged again, now numbering four: Elton, Haddon, Glossop and Taylor. In 1947, just after the Second World War, there was another change when the number of Houses became three again and Barker reappeared, replacing Haddon and Elton. Competition between the Houses was no longer just on the basis of sport, and other activities had become important too. By 1959 there were plans to create a fourth House again and this time the new House was to be named Cockerton. This naming was a tribute to the Cockerton family that had given over 50 years of service to the School, firstly with Mr VR Cockerton and then with his son Mr RWP Cockerton. Both had been School Governors and Mr VR Cockerton had been actively involved in the establishing of the current school site. So ever since the early 1960s there have been four Houses – Barker, Cockerton, Glossop and Taylor – just like now – and students are no longer allocated to these Houses according to where they live, but according to which of the pairs of form tutor groups they are in. New buildings The school has been repeatedly extended in recent years, from the Cavendish library (named for the family surname of the Dukes of Devonshire, the influential aristocratic family of the nearby Chatsworth estate) in the 1990s to a new sixth form centre and sports facilities opened in 2005. This latest extension was funded partly by the sale of the school's boarding house, Castle Hill, which until its sale provided catered accommodation for school pupils. The boarding house closed in 2003. Music and orchestra Music is a major strength at the school with a wide variety of extra-curricular ensembles including Senior Orchestra (about 80 members), Senior Choir (about 100), Junior Choir (125), Brass Band (10), Senior Wind Band (60), Intermediate Strings, Junior Strings, Intermediate Wind Band, Junior Wind Band, Folk Group, clarinet choir, flute choir, etc. In July 2004, the Lady Manners School Orchestra reached the national finals of the National Festival of Music for Youth and performed in the Royal Festival Hall, London. In July 2005, the orchestra, conducted by Robert Steadman, was awarded "outstanding performance" at the National Festival Music for Youth Finals at Symphony Hall, Birmingham and in November 2005 they were invited to play at the Schools' Prom at the Royal Albert Hall where the 70+ strong orchestra