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The Navy Command is the current headquarters body of the Royal Navy, and as of 2012 its major organisational grouping. It is a hybrid, neither a command, nor simply an installation. Royal Navy official writings describe Navy Command Headquarters both as a physical site, on Whale Island (at Portsmouth, Hampshire), a collective formed of the most senior RN officers, and as a budgetary grouping.
On 1 April 2006 the Fleet Top Level Budget was established. A Top Level Budget (TLB) is the major financial accounting group of the MOD. On 1 April 2010 the Fleet TLB was renamed Navy Command. Navy Command is the Top Level Budget (holder) for the RN. Navy Command supports the First Sea Lord in the management of the Command, and delivers the Service's current and future outputs as articulated in the Command Plan.