Where is the EGR Valve in the Ford Mondeo 1.8LX 2001 y Reg Model?

I have been told that the problem with my car relating to the engine management light being on is due to the EGR Valve. This has been reset a couple of times but the light keep coming on. It has been of no consequence (just driven 300 miles there and back on holiday). However, I have been told by an RAC man that this is commonly due to doing lots of short journeys and eventually my car will begin to spill out black smoke if it is not sorted out. I am a community midwife so this explanation is very true to my driving habits. He also told me there is no need to replace this valve which is approximately £60.00 but it can be taken out and cleaned out. Can someone tell me where it is? Thanks!