Shaun - If you fly to Southampton apparently there is a free shuttle bus to the CTC from the airport (I don't know the details, but you can read back through the thread to find them). I don't think flights from Glasgow are too bad price wise if you book far enough ahead and don't mind travelling at slightly obscure times of day, but you're probably still looking at over £100
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I think you have to get through to stage 3 now before they offer reimbursement for travel expenses, there are certainly none offered for stage 1 and I'm fairly sure I read that it was the same for stage 2.