In November 1997 it announced that it would close the Filton site (former BAe Dynamics) in August 1999, with the planned transfer of 300 of 400 personnel and staff from Bristol to Stevenage. The Filton site specialised in scientific satellites and their computer software; projects included Ulysses, Hubble Space Telecsope Solar Arrays, Giotto, Envisat / Polar Platform, Soho and the Cluster spacecraft destroyed in the first FLIGHT of Ariane V. Over 380 staff left the Company and as a result MMS lost the ESA Prime Contract for the Rosetta spacecraft.