It seems like we've decided to do the same thing at the same time!
I've spoken with the BGS guys as well as looked through a lot on here and while there isn't much information about the PPL course they have the ATPL is highly rated. For me I think their material will be sufficient and its layout works well for me.
Air law is totally different to anything I've studied before (I'm similarly from a scientific background) and I'm interested to see what everyone else suggests.