I don't think the engines have been started up for several years now. The aircraft moved into its current position in the aircraft park in 2004 and since then, the engines have been run a few times. The last time must have been close to 10 years ago now. The main problem is that of finding a servicable starter for a Tyne, if you have one lying about.... But apart from that, the engines were drinking oil at quite a rate too.
The Vanguard is currently hiding within the scaffolding so that any corrosion issues can be dealt with and the airframe can be repainted.