txeriff
I'll be a bit kinder than some of the others have been, but you would do well to look at what they're telling you - because to be frank it's very clear, so if you have failed to understood what the GS component ACTUALLY entails - and WHERE it is! then, well....you're going to have all sorts of fun when you come to get your head around Gen Nav, performance, flight planning etc
So - for avoidance of any doubt GS can be done one of two ways (at any provider)
1/ Full time residential (which IS not optional in Integrated training, but IS available as an option for modular students)
2/ Part time modular
If you go route 1, then you will be expected to find accomodation close to the place in which the GS is given, for the duration of the ground school course. In the case of Oxford, this is Oxford airport (sorry, sorry ....."Oxford LONDON" airport...

) based in Kidlington, just outside Oxford. Fact. OAA DO have centres all over the shop, it's true, but for base level ATPL groundschool training, it's Oxford. end of. Likewise, I don't know the exact address, but if you go to Bristol, it will be at their premises, IN BRISTOL. Fact.
This route will take
about six months and you'll likely study the modules in two 'sets' of around about seven subjects each. You will therefore take 7 exams after
about 3 months and the remaining 7
about 3 months after that. You're then free to do whatever the hell else it is you want to do.
If you go route (2) Then you will be provided a bunch of notes and manuals and you'll go through it at your own pace, in your own time. You can take 1 exam a month, or all 14 (if you were certifiably mad and wanted to fail at least one in all probability) in one month. On MOST distance learning courses, you'll book yourself onto a "brush up" course of some description, once you figure you know most of the stuff in the first set of exams you want to take. At this "brush up" course, which typically will be of about 1-2 weeks duration FULL TIME, the instructors will knock into shape anything you're not quite sure about. Again, using the specific examples of Oxford and Bristol....you'll be required to lodge at - suprise, suprise- Oxford or Bristol for these brush up sessions. Full time - you don't get to go home at the end of every day....well unless you live close enough to commute!
There are distinct pros and cons to both routes....you should look at things like time to learn/complete, the financial impact of being out of work for 6 months Vs earning whilst you learn, The impact of trying to learn complex technical stuff whilst you're trying to hold down a day job, the benefit of having someone who really knows the subject there to ask at every turn, the ability to cut out some of the vast amount of material you don't really need to know, the ability to time when you take the exams a bit and so on.
I don't necessarily agree with Mad Jocks tone, or indeed the content of a lot of what he says, but he has given you some sterling advice in post 17. Get hold of Lasors, for there are some weird rules about needing to complete your professional flying training within 3 years of exams date (I can't remember off the top of my head whether it's 3 years from first exam or last, or whether it's IR or just CPL. Work out what your training route will look like - and I would be amazed if you could do it all for 30k Euros, - And look at lots of different GS providers, because you may find one will do it in a slightly different way that works best for you.