Caledonian (and others!),
It rather depends on how you look at things - TCX have a busy summer programme, certainly, but that's not to say that the 2 A330's are overstretched. It's simply a case of building a flying programme that fits with the equipment available. In the case of TCX, that simply means that there is a lot of leeway built in to allow for unforseen events (look at this morning for example!), so that a single delayed departure will not necessarily impact upon subsequent rotations (food for thought for another well-known Manchester-based A330 operator?), and most importantly plenty of downtime is made available for essential maintenance. Sure, it would be easy to squeeze another Caribbean (or wherever) rotation into the flying program, but the costs associated with a string of delayed departures could soon outweigh the revenue generated and so it becomes a pointless exercise...
PHX