There is another important facet to this.
The airlines are currently putting enormous pressure on the CAA to have general aviation pay for LARS. They allege that they are cross-subsidising GA to the tune of millions of pounds by picking up the tab. They want those millions of pounds to be paid by you and me.
There's a dogfight going on at the moment. AOPA's strongest weapon is the demand that if GA must pay for LARS, then GA must be guaranteed a full LARS service at all times. The other side obviously balks at this.
There's a lot of politicking going on here. Tread warily, lest your answer to the question "do you care about LARS" be taken down and used in evidence when the question "how much?" arises..