If you request a 'basic' from a LARS provider who you used to provide you with an 'enhanced-FIS', you may well be disappointed.
Eh??
What if you also want something else from them, such as DAAIS which they are promulgated to provide or the QNH of their airfield (which is under some controlled airspace), and you quite like having an alerting service, but you've no need at all for someone to be watching you on radar, particularly as you're flying at 7,000', above all the other traffic you could conflict with, and they sound somewhat busy anyway? They'll give you the DAAIS and QNH and push you off onto London Information will they??
I didn't get any sense of that from reading the documentation.