Have you run a search yet? This topic is well documented and discussed on here.
http://www.pprune.org/search.php
To give you a headstart:
http://www.pprune.org/professional-p...undschool.html
http://www.pprune.org/professional-p...5-figures.html
There are several distance providers now for ATPL:
Bristol
Oxford
CATS
BCFT
ProPilot
and I'm sure there are more.
I did distance learning via Bristol and would fully recommend them. Haven't tried anyone else so I can't say if they are good or not.
I did my First Class medical at Gatwick and they were able to issue the medical the same day unless they need to do further investigations.
Do the medical first. If you pass, sign up for a ground school, which ever one works best for you. When you get close to finishing, start looking for a school for the flying bit. I personally thought BCFT was quite a good place at a decent price.
I've started to hear people talking about doing conversions in Iceland and being happy with it, but I haven't been there myself.
http://www.pprune.org/nordic-forum/4...ggestions.html
Now, go use the search function
http://www.pprune.org/search.php