Please go and visit the Schools. Oxford put on seminars every now and again that you an go to-see their website.
Do your research thorougly-what are your employment prospects? The schools would have you believe that where you train makes all the difference, but in truth they are trying to relieve you of £60-70k so they would say that. Don't believe everything schools tell you!
Your list omits Cabair and Pilot Training College of Ireland. You may decide against these places, but good research demands you look at them.
CTC is a good option if you can get in because it's the least risky route for the student.
A thorough search on this forum should answer many of your questions, and viiting the schools (where practial) should answer many of the others.
Also be aware that the modular route is far cheaper.
Finally, you don't mention if you have flown before, but a few trial lessons might be a good idea to see if you really like flying and have some aptitude for it: not everyone does.
Good luck-your'e at the start of a very steep learning curve!
Bri