Novacon Carbon Footprint

Getting two of us from Edinburgh to Walsall for Novacon:

By air: circa £120 (air fares and taxis), 3 hrs.

By car: circa £120 (petrol and running costs), 6 hrs.

By rail: circa £200, 6 hrs.

And that is booking ten weeks in advance.

According to the Guardian's carbon-offset website, flying would generate 240 kg of carbon dioxide, which would cost £1.77 to offset. Driving would generate 210 kg, costing £1.58 to offset. No data for trains.

EDIT: Or we could give the GoH a lift and split the costs!