Rattling from engine area on start-up

[Isoproturon1]

Just bought a 53-plate 9-3 saloon with the 1.8i engine; whenever the engine is started from cold there is a rattling from the engine bay which goes away when the engine warms up. I am pretty convinced it is a 'tin sheet' type of noise rather than the engine - are there any heat shields etc. which could be loose and therefore causing this ?

Fingers crossed it is nothing more serious.

Cheers.