In reply to aldo56:
Fly to Geneva and pay excess baggage (or travel light) and get a transfer bus from the airport.
Drive, lots of kit room and useful to have a car out there if you want to go elsewhere. Make a road trip of it. Costs about £500 return for the car, including petrol, tolls and eurotunnel. Could make it cheaper using the ferry and back roads, but fill the car with people and it's not too bad.
National Express. Takes 24 hours from the SE, I imagine a while longer from Glasgow. Friends have done it and said it was horrible, and have been refused journeys due to too many bags. But it does only cost £99.