Landrover Discovery TD5 ES engine screaming and metal noise over 2000 revs - HELP

Hi I have a Landrover Discovery TD5 ES Auto - she has just started to scream like a pig when starting off and more to the point over 2000 revs. There is also a metallic sound that I think comes from the bit that is to the right of the engine manifold and nearest the windscreen. Can someone advise please.

welcome

pop over to the Disco bit - peeps are more like;y to answer yu there.

also pics of "the bit that is to the right of the engine manifold and nearest the windscreen" might help