In the details of the report (Appendix 7, Annex 8, Figure 4.5) their own figures suggest that at small, "low movement" airfields (they use Dunsfold as an example) the fee will equate to almost £5 per movement.
Can small airfields afford to swallow such a cost? Can they afford to put up their landing fees by a fiver or go non-radio (both putting pilots off visiting and hurting them again)?
They don't seem to think so: "This does not in itself imply that the landing charges under AIP would be unaffordable, just that there would be a discernable impact."
This from the Helios review, so no worries here either.
...Furthermore, the owners of Dunsfold have been attempting to replace the aerodrome with business and private property. Whilst the local council refused the initial application the owners have appealed. The long term future of the airfield must therefore be in doubt.