Home> Financial statements> Notes to the consolidated financial statements> 1. Revenue prev next 1. Revenue 2012£m2011£mHeat treatment and metal joining, hot isostatic pressing and surface technology services587.8570.7Other operating income (see note 3)5.24.5Investment revenue (see note 5)0.20.2Total Revenue (as defined in IAS 18 Revenue)593.2575.4 prev next