According to the following there were 1,146 CPL (A)'s issued during 2006-2007 by the UK CAA. In order to get a feel for the market you need to make certain assumptions. Some of those CPL holders will want to be career instructors, some will run out of money and not get the IR so won't be in the mix for a commercial flying job. Some won't be cut out for the job at all and not get interviewed. Some won't be able to put together a decent CV which might work in your favour. BUT in the previous year there were another 1,129 CPL's issued so you have to bear in mind that some of them will be in the mix looking for a job as well. Then each week the system is churning out another batch of wannabes.
Also bear in mind that the UK/Ireland are probably the most welcoming for prospective pilots in as far as if you have a JAA licence then you are on an equal footing to get a job irrespective of where you trained subject of course to jumping through the necessary hoops.
All in all it makes sobering reading those stats coupled with the number of students across Europe that are coming out of the flying schools each year.
http://www.caa.co.uk/docs/175/Licenc...20-%202007.pdf