Louis
The University of Bath has basically done this for you, but if you must start from scratch (and it is rather late for a final year project) there are a number of way you can go around it.

Method 1, Mass time distance equals the energy, if you take time into account then it can be expressed as kWh

Method 2, Find out fuel consumption of different transport methods and what percentage of the load your load of timber will be. Multiply all the fractions together to end up with your answer.

Method 3, (probably good enough for a MSc). Calculate the embodied energy in the whole infrastructure from cradle to grave, that will include the building of trucks and ships, chainsaws, processing machinery, workers housing and transport, depots, admin carbon foot print, environmental damage, carbon sequestration losses, waste, opportunity costs, use of land. Gets to be fun after a while.

Another way to look at it is how many MJ it takes to transport a MJ of timber, just received an ex students analyses of 'food miles' and it is quite shocking how little is used in transport
Image courtesy of MV

Damon, yes, and other 'pick me ups'.

Always makes me giggle at Transition meetings when people tell me that we have to save the rain forests because they may hold the 'cure for cancer' in them, but think of the 'drug miles' involved, give a barrel of crude to make most things efficiently every day

Coffee comes out at 15 kWh per person per week, sobering thought. Alcohol on the other hand is just over 2 kWh per person per week, and that is for down here.

Thanks for your advice everyone. Matt i have been looking for a website like that one for ages so thanks for that!
ST, when you say that the University of Bath has already done this do you mean the Inventory of Carbon and Energy? I will most certainly be using that.

Cheers!