I've had it to my local garage today [3.0 Elite,Y reg],he couldn't locate the leak,right at the back of the engine apparantly..he's put some kinda sealant in for the time being.After a bit of a search on here,i've read it's most likely the Heater by-pass valve?Accessible under the leaf-scuttle,is that right?Don't wanna tell him how to suck eggs,but any way of saving beer-tokens n i'm all for it

Also said he couldn't get the oil filter out n it was in tight....back in the morning for another go at the filter,just wondering if the probable cause of the leak is the HBV,and is it an involved job or not.
Cheers