LONDON | Asset manager company AXA Real Estate said Monday it signed 68 leases on behalf of its clients representing a total of 113,350 sqm of space across its Spanish portfolio in 2011. This marks an increase of around 90% compared to 2010, when 60,855 sqm of space was let across 42 leases. Of the 68 lettings, 23 representing 10,707 sqm, were new leases, while the remaining 45, accounting for 102,643 sq m of space, comprised lease…