The answer is that it is neither an integrated course nor a modular course within the meaning of JAR-FCL 1 - it is no course at all. This outfit would appear to be acting as some sort of agent, directing training to other approved organisations in the UK (apparently BGS and Tayflite).
If you wish to throw money at someone to organise your modular courses for you then Angel City Fliers are probably as good, or bad, as any other agency. However, you would probably find it a great deal cheaper to do your own research and organise your own training. You may end up doing groundschool with BGS and the flying with Tayflite but at least you would not be paying a premium to Angel City Fliers for the privilege.