[Bozza]

Not sure what this question is intended to illustrate as Thomas Cook did a substantial amount of business online too. Without looking, I wouldn't be more surprised if they did more online than through their high street presence.

So, some of those who reply "online agents" may well be using Thomas Cook (many won't, of course).

Surely a more pertinent question is those who use an agent (high street and/or online) v those who book DIY.