Oaktree Capital-backed firm Pure Data Centres said on Monday it plans to spend up to 1 billion euros ($1.17 billion) on an Amsterdam campus, in one of the biggest "hyperscale" data centre investments announced in Europe this year. Pure Data Centres said the campus will be leased by a single 'hyperscaler' tenant, which are large-scale cloud service providers. A raft of planned data centres projects have been announced in Europe this year, but it is less common for a project to have a lease already agreed.