It's 5.30 in the morning, and I am cycling through the streets of Edinburgh towards Waverley station. Cash machines blink at me from banks, and the eery quiet is broken only by the growl of a taxi and the occasional burst of pre-dawn birdsong.
At the station the bike rack, as always, is full. But it's not long before I'm settled in my seat on the 5.50 am train to London, exhaling. This was the train I had to catch to make my journey feasible - Paris in a day on the inaugural Eurostar service from St Pancras International.